Quantities and units - Part 10: Atomic and nuclear physics

ISO 80000-10:2009 gives the names, symbols, and definitions for quantities and units used in atomic and nuclear physics. Where appropriate, conversion factors are also given.

Grandeurs et unités - Partie 10: Physique atomique et nucléaire

L'ISO 80000-10:2009 donne les noms, les symboles et les définitions des grandeurs et unités de physique atomique et nucléaire. Des facteurs de conversion sont également indiqués, s'il y a lieu.

Veličine in enote - 10. del: Atomska in jedrska fizika

V tem mednarodnem standardu so veličine in enote v preglednicah razvrščene tako, da so veličine na levih, enote pa na ustreznih desnih straneh. Vse enote med polnima vodoravnima črtama na desni strani pripadajo veličinam med ustreznima polnima črtama na levi strani. Če je bila pri reviziji dela standarda ISO 31 zaporedna številka veličine spremenjena, je številka iz prejšnje izdaje navedena v oklepaju na levi strani pod novo številko veličine; pomišljaj pomeni, da prejšnja izdaja ni vsebovala te veličine. Imena najpomembnejših veličin v tem mednarodnem standardu so podana skupaj s svojimi simboli in največkrat tudi z definicijami. Ta imena in simboli so priporočila. Definicije so podane samo za opredelitev veličin v mednarodnem sistemu veličin (ISQ), navedenih na levih straneh preglednice, in niso nujno popolne. Skalarni, vektorski in tenzorski značaj nekaterih veličin je prikazan, zlasti kadar je potreben za definicijo. Večina veličin ima podano samo eno ime in samo en simbol; če sta za eno veličino podani dve imeni ali več oziroma dva simbola ali več in razlika ni opredeljena, so enakovredni. Kadar obstajata dva tipa poševnih črk (kot npr. ϑ in θ; ϕ in φ; a in a; g in g), je uporabljen samo eden. To ne pomeni, da drugi ni enako sprejemljiv. Takšnim različicam ni priporočljivo pripisovati različnih pomenov. Če je simbol v oklepaju, pomeni da je "rezervni" in se v besedilu uporablja takrat, kadar ima glavni simbol drugačen pomen. V angleški izdaji so francoska imena veličin v poševnem tisku, pred njimi pa stoji oznaka fr. Spol je pri francoskem imenu označen z oznako (m) za moški in (f) za ženski spol, ki stoji neposredno za samostalnikom v francoskem imenu.

General Information

Status
Withdrawn
Publication Date
29-Jan-2014
Withdrawal Date
06-Nov-2019
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
07-Nov-2019
Due Date
30-Nov-2019
Completion Date
07-Nov-2019

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INTERNATIONAL ISO
STANDARD 80000-10
First edition
2009-12-01
Quantities and units —
Part 10:
Atomic and nuclear physics
Grandeurs et unités —
Partie 10: Physique atomique et nucléaire

Reference number
©
ISO 2009
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved

Contents Page
Foreword .iv
Introduction.vi
1 Scope.1
2 Normative references.1
3 Names, symbols, and definitions .1
Annex A (informative) Non-SI units used in atomic and nuclear physics .66
Bibliography.67

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for whom a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 80000-10 was prepared by Technical Committee ISO/TC 12, Quantities and units,
in co-operation with IEC/TC 25, Quantities and units.
This first edition of ISO 80000-10 cancels and replaces ISO 31-9:1992 and ISO 31-10:1992. It also
incorporates Amendments ISO 31-9:1992/Amd.1:1998 and ISO 31-10:1992/Amd.1:1998. The major technical
changes from the previous standards are the following:
⎯ Annex A and Annex B to ISO 31-9:1992 have been deleted (as they are covered by ISO 80000-9);
⎯ Annex C to ISO 31-9:1992 has become Annex A;
⎯ Annex D to ISO 31-9:1992 has been deleted;
⎯ the presentation of numerical statements has been changed;
⎯ the Normative references have been changed;
⎯ items 10-33 and 10-53 from ISO 31-10:1992 have been deleted;
⎯ new items have been added;
⎯ many definitions have been re-formulated;
⎯ newer values for fundamental constants have been used.
ISO 80000 consists of the following parts, under the general title Quantities and units:
⎯ Part 1: General
⎯ Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
⎯ Part 3: Space and time
⎯ Part 4: Mechanics
iv © ISO 2009 – All rights reserved

⎯ Part 5: Thermodynamics
⎯ Part 7: Light
⎯ Part 8: Acoustics
⎯ Part 9: Physical chemistry and molecular physics
⎯ Part 10: Atomic and nuclear physics
⎯ Part 11: Characteristic numbers
⎯ Part 12: Solid state physics
IEC 80000 consists of the following parts, under the general title Quantities and units:
⎯ Part 6: Electromagnetism
⎯ Part 13: Information science and technology
⎯ Part 14: Telebiometrics related to human physiology
Introduction
0.1 Arrangements of the tables
The tables of quantities and units in this International Standard are arranged so that the quantities are
presented on the left-hand pages and the units on the corresponding right-hand pages.
All units between two full lines on the right-hand pages belong to the quantities between the corresponding full
lines on the left-hand pages.
Where the numbering of an item has been changed in the revision of a part of ISO 31, the number in the
preceding edition is shown in parenthesis on the left-hand page under the new number for the quantity; a dash
is used to indicate that the item in question did not appear in the preceding edition.
0.2 Tables of quantities
The names in English and in French of the most important quantities within the field of this International
Standard are given together with their symbols and, in most cases, their definitions. These names and
symbols are recommendations. The definitions are given for identification of the quantities in the International
System of Quantities (ISQ), listed on the left hand pages of the table; they are not intended to be complete.
The scalar, vector or tensor character of quantities is pointed out, especially when this is needed for the
definitions.
In most cases only one name and only one symbol for the quantity are given; where two or more names or
two or more symbols are given for one quantity and no special distinction is made, they are on an equal
footing. When two types of italic letters exist (for example as with ϑ and θ; φ and φ ; a and a; g and g), only one
of these is given. This does not mean that the other is not equally acceptable. It is recommended that such
variants not be given different meanings. A symbol within parentheses implies that it is a reserve symbol, to
be used when, in a particular context, the main symbol is in use with a different meaning.
In this English edition, the quantity names in French are printed in an italic font, and are preceded by fr. The
gender of the French name is indicated by (m) for masculine and (f) for feminine, immediately after the noun in
the French name.
0.3 Tables of units
0.3.1 General
The names of units for the corresponding quantities are given together with the international symbols and the
definitions. These unit names are language-dependent, but the symbols are international and the same in all
th
languages. For further information, see the SI Brochure (8 edition, 2006) from BIPM and ISO 80000-1.
The units are arranged in the following way:
a) The coherent SI units are given first. The SI units have been adopted by the General Conference on
Weights and Measures (Conférence Générale des Poids et Mesures, CGPM). The coherent SI units and
their decimal multiples and submultiples formed with the SI prefixes are recommended, although the
decimal multiples and submultiples are not explicitly mentioned.
vi © ISO 2009 – All rights reserved

b) Some non-SI units are then given, namely those accepted by the International Committee for Weights
and Measures (Comité International des Poids et Mesures, CIPM), or by the International Organization of
Legal Metrology (Organisation Internationale de Métrologie Légale, OIML), or by ISO and IEC, for use
with the SI.
Such units are separated from the SI units in the item by use of a broken line between the SI units and
the other units.
c) Non-SI units currently accepted by the CIPM for use with the SI are given in small print (smaller than the
text size) in the “Conversion factors and remarks” column.
d) Non-SI units that are not recommended are given only in annexes in some parts of this International
Standard. These annexes are informative, in the first place for the conversion factors, and are not integral
parts of the standard. These deprecated units are arranged in two groups:
1) units in the CGS system with special names;
2) units based on the foot, pound, second, and some other related units.
e) Other non-SI units given for information, especially regarding the conversion factors, are given in
informative annexes in some parts of this International Standard.
0.3.2 Remark on units for quantities of dimension one, or dimensionless quantities
The coherent unit for any quantity of dimension one, also called a dimensionless quantity, is the number one,
symbol 1. When the value of such a quantity is expressed, the unit symbol 1 is generally not written out
explicitly.
EXAMPLE 1 Refractive index n = 1,53 × 1 = 1,53
Prefixes shall not be used to form multiples or submultiples of this unit. Instead of prefixes, powers of 10 are
recommended.
EXAMPLE 2 Reynolds number Re = 1,32 × 10
Considering that the plane angle is generally expressed as the ratio of two lengths and the solid angle as the
ratio of two areas, in 1995 the CGPM specified that, in the SI, the radian, symbol rad, and steradian, symbol sr,
are dimensionless derived units. This implies that the quantities plane angle and solid angle are considered as
derived quantities of dimension one. The units radian and steradian are thus equal to one; they may either be
omitted, or they may be used in expressions for derived units to facilitate distinction between quantities of
different kind but having the same dimension.
0.4 Numerical statements in this International Standard
The sign = is used to denote “is exactly equal to”, the sign ≈ is used to denote “is approximately equal to”, and
the sign := is used to denote “is by definition equal to”.
Numerical values of physical quantities that have been experimentally determined always have an associated
measurement uncertainty. This uncertainty should always be specified. In this International Standard, the
magnitude of the uncertainty is represented as in the following example.
EXAMPLE l = 2,347 82(32) m
In this example, l = a(b) m, the numerical value of the uncertainty b indicated in parentheses is assumed to
apply to the last (and least significant) digits of the numerical value a of the length l. This notation is used
when b represents the standard uncertainty (estimated standard deviation) in the last digits of a. The
numerical example given above may be interpreted to mean that the best estimate of the numerical value of
the length l, when l is expressed in the unit metre is 2,347 82, and that the unknown value of l is believed to
lie between (2,347 82 − 0,000 32) m and (2,347 82 + 0,000 32) m with a probability determined by the
standard uncertainty 0,000 32 m and the probability distribution of the values of l.
0.5 Special remarks
0.5.1 Quantities
The fundamental physical constants given in ISO 80000-10 are quoted in the consistent values of the
fundamental physical constants published in “2006 CODATA recommended values”. See the CODATA
website: http://physics.nist.gov/cuu/constants/index.html.
0.5.2 Special units
Individual scientists should have the freedom to use non-SI units when they see a particular scientific
advantage in their work. For this reason, non-SI units which are relevant for atomic and nuclear physics are
listed in Annex A.
viii © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 80000-10:2009(E)

Quantities and units —
Part 10:
Atomic and nuclear physics
1 Scope
ISO 80000-10 gives the names, symbols, and definitions for quantities and units used in atomic and nuclear
physics. Where appropriate, conversion factors are also given.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 80000-3:2006, Quantities and units — Part 3: Space and time
ISO 80000-4:2006, Quantities and units — Part 4: Mechanics
ISO 80000-5:2007, Quantities and units — Part 5: Thermodynamics
IEC 80000-6:2008, Quantities and units — Part 6: Electromagnetism
ISO 80000-7:2008, Quantities and units — Part 7: Light
ISO 80000-9:2009, Quantities and units — Part 9: Physical chemistry and molecular physics
3 Names, symbols, and definitions
The names, symbols, and definitions for quantities and units used in atomic and nuclear physics are given on
the following pages.
ATOMIC AND NUCLEAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
10-1.1 atomic number, number of protons in an A nuclide is a species of atom with
Z
...


SLOVENSKI STANDARD
01-marec-2014
1DGRPHãþD
SIST ISO 31-10:1995/Amd. 1:2001
SIST ISO 31-10+A1:2008
SIST ISO 31-9:1995/Amd. 1:2001
SIST ISO 31-9+A1:2008
9HOLþLQHLQHQRWHGHO$WRPVNDLQMHGUVNDIL]LND
Quantities and units - Part 10: Atomic and nuclear physics
Grandeurs et unités - Partie 10: Physique atomique et nucléaire
Ta slovenski standard je istoveten z: ISO 80000-10:2009
ICS:
01.060 9HOLþLQHLQHQRWH Quantities and units
07.030 Fizika. Kemija Physics. Chemistry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 80000-10
First edition
2009-12-01
Quantities and units —
Part 10:
Atomic and nuclear physics
Grandeurs et unités —
Partie 10: Physique atomique et nucléaire

Reference number
©
ISO 2009
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved

Contents Page
Foreword .iv
Introduction.vi
1 Scope.1
2 Normative references.1
3 Names, symbols, and definitions .1
Annex A (informative) Non-SI units used in atomic and nuclear physics .66
Bibliography.67

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for whom a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 80000-10 was prepared by Technical Committee ISO/TC 12, Quantities and units,
in co-operation with IEC/TC 25, Quantities and units.
This first edition of ISO 80000-10 cancels and replaces ISO 31-9:1992 and ISO 31-10:1992. It also
incorporates Amendments ISO 31-9:1992/Amd.1:1998 and ISO 31-10:1992/Amd.1:1998. The major technical
changes from the previous standards are the following:
⎯ Annex A and Annex B to ISO 31-9:1992 have been deleted (as they are covered by ISO 80000-9);
⎯ Annex C to ISO 31-9:1992 has become Annex A;
⎯ Annex D to ISO 31-9:1992 has been deleted;
⎯ the presentation of numerical statements has been changed;
⎯ the Normative references have been changed;
⎯ items 10-33 and 10-53 from ISO 31-10:1992 have been deleted;
⎯ new items have been added;
⎯ many definitions have been re-formulated;
⎯ newer values for fundamental constants have been used.
ISO 80000 consists of the following parts, under the general title Quantities and units:
⎯ Part 1: General
⎯ Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
⎯ Part 3: Space and time
⎯ Part 4: Mechanics
iv © ISO 2009 – All rights reserved

⎯ Part 5: Thermodynamics
⎯ Part 7: Light
⎯ Part 8: Acoustics
⎯ Part 9: Physical chemistry and molecular physics
⎯ Part 10: Atomic and nuclear physics
⎯ Part 11: Characteristic numbers
⎯ Part 12: Solid state physics
IEC 80000 consists of the following parts, under the general title Quantities and units:
⎯ Part 6: Electromagnetism
⎯ Part 13: Information science and technology
⎯ Part 14: Telebiometrics related to human physiology
Introduction
0.1 Arrangements of the tables
The tables of quantities and units in this International Standard are arranged so that the quantities are
presented on the left-hand pages and the units on the corresponding right-hand pages.
All units between two full lines on the right-hand pages belong to the quantities between the corresponding full
lines on the left-hand pages.
Where the numbering of an item has been changed in the revision of a part of ISO 31, the number in the
preceding edition is shown in parenthesis on the left-hand page under the new number for the quantity; a dash
is used to indicate that the item in question did not appear in the preceding edition.
0.2 Tables of quantities
The names in English and in French of the most important quantities within the field of this International
Standard are given together with their symbols and, in most cases, their definitions. These names and
symbols are recommendations. The definitions are given for identification of the quantities in the International
System of Quantities (ISQ), listed on the left hand pages of the table; they are not intended to be complete.
The scalar, vector or tensor character of quantities is pointed out, especially when this is needed for the
definitions.
In most cases only one name and only one symbol for the quantity are given; where two or more names or
two or more symbols are given for one quantity and no special distinction is made, they are on an equal
footing. When two types of italic letters exist (for example as with ϑ and θ; φ and φ ; a and a; g and g), only one
of these is given. This does not mean that the other is not equally acceptable. It is recommended that such
variants not be given different meanings. A symbol within parentheses implies that it is a reserve symbol, to
be used when, in a particular context, the main symbol is in use with a different meaning.
In this English edition, the quantity names in French are printed in an italic font, and are preceded by fr. The
gender of the French name is indicated by (m) for masculine and (f) for feminine, immediately after the noun in
the French name.
0.3 Tables of units
0.3.1 General
The names of units for the corresponding quantities are given together with the international symbols and the
definitions. These unit names are language-dependent, but the symbols are international and the same in all
th
languages. For further information, see the SI Brochure (8 edition, 2006) from BIPM and ISO 80000-1.
The units are arranged in the following way:
a) The coherent SI units are given first. The SI units have been adopted by the General Conference on
Weights and Measures (Conférence Générale des Poids et Mesures, CGPM). The coherent SI units and
their decimal multiples and submultiples formed with the SI prefixes are recommended, although the
decimal multiples and submultiples are not explicitly mentioned.
vi © ISO 2009 – All rights reserved

b) Some non-SI units are then given, namely those accepted by the International Committee for Weights
and Measures (Comité International des Poids et Mesures, CIPM), or by the International Organization of
Legal Metrology (Organisation Internationale de Métrologie Légale, OIML), or by ISO and IEC, for use
with the SI.
Such units are separated from the SI units in the item by use of a broken line between the SI units and
the other units.
c) Non-SI units currently accepted by the CIPM for use with the SI are given in small print (smaller than the
text size) in the “Conversion factors and remarks” column.
d) Non-SI units that are not recommended are given only in annexes in some parts of this International
Standard. These annexes are informative, in the first place for the conversion factors, and are not integral
parts of the standard. These deprecated units are arranged in two groups:
1) units in the CGS system with special names;
2) units based on the foot, pound, second, and some other related units.
e) Other non-SI units given for information, especially regarding the conversion factors, are given in
informative annexes in some parts of this International Standard.
0.3.2 Remark on units for quantities of dimension one, or dimensionless quantities
The coherent unit for any quantity of dimension one, also called a dimensionless quantity, is the number one,
symbol 1. When the value of such a quantity is expressed, the unit symbol 1 is generally not written out
explicitly.
EXAMPLE 1 Refractive index n = 1,53 × 1 = 1,53
Prefixes shall not be used to form multiples or submultiples of this unit. Instead of prefixes, powers of 10 are
recommended.
EXAMPLE 2 Reynolds number Re = 1,32 × 10
Considering that the plane angle is generally expressed as the ratio of two lengths and the solid angle as the
ratio of two areas, in 1995 the CGPM specified that, in the SI, the radian, symbol rad, and steradian, symbol sr,
are dimensionless derived units. This implies that the quantities plane angle and solid angle are considered as
derived quantities of dimension one. The units radian and steradian are thus equal to one; they may either be
omitted, or they may be used in expressions for derived units to facilitate distinction between quantities of
different kind but having the same dimension.
0.4 Numerical statements in this International Standard
The sign = is used to denote “is exactly equal to”, the sign ≈ is used to denote “is approximately equal to”, and
the sign := is used to denote “is by definition equal to”.
Numerical values of physical quantities that have been experimentally determined always have an associated
measurement uncertainty. This uncertainty should always be specified. In this International Standard, the
magnitude of the uncertainty is represented as in the following example.
EXAMPLE l = 2,347 82(32) m
In this example, l = a(b) m, the numerical value of the uncertainty b indicated in parentheses is assumed to
apply to the last (and least significant) digits of the numerical value a of the length l. This notation is used
when b represents the standard uncertainty (estimated standard deviation) in the last digits of a. The
numerical example given above may be interpreted to mean that the best estimate of the numerical value of
the length l, when l is expressed in the unit metre is 2,347 82, and that the unknown value of l is believed to
lie between (2,347 82 − 0,000 32) m and (2,347 82 + 0,000 32) m with a probability determined by the
standard uncertainty 0,000 32 m and the probability distribution of the values of l.
0.5 Special remarks
0.5.1 Quantities
The fundamental physical constants given in ISO 80000-10 are quoted in the consistent values of the
fundamental physical constants published in “2006 CODATA recommended values”. See the CODATA
website: http://physics.nist.gov/cuu/constants/index.html.
0.5.2 Special units
Individual scientists should have the freedom to use non-SI units when they see a particular scientific
advantage in their work. For this reason, non-SI units which are relevant for atomic and nuclear physics are
listed in Annex A.
viii © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 80000-10:2009(E)

Quantities and units —
Part 10:
Atomic and nuclear physics
1 Scope
ISO 80000-10 gives the names, symbols, and definitions for quantities and units used in atomic and nuclear
physics. Where appropriate, conversion factors are also given.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
...


NORME ISO
INTERNATIONALE 80000-10
Première édition
2009-12-01
Grandeurs et unités —
Partie 10:
Physique atomique et nucléaire
Quantities and units —
Part 10: Atomic and nuclear physics

Numéro de référence
©
ISO 2009
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ii © ISO 2009 – Tous droits réservés

Sommaire Page
Avant-propos .iv
Introduction.vi
1 Domaine d'application .1
2 Références normatives.1
3 Noms, symboles et définitions .1
Annexe A (informative) Unités non SI utilisées en physique atomique et nucléaire .68
Bibliographie.69

Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée
aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 80000-10 a été élaborée par le comité technique ISO/TC 12, Grandeurs et unités, en collaboration avec
le comité d'études CEI/CE 25, Grandeurs et unités.
Cette première édition de l'ISO 80000-10 annule et remplace l'ISO 31-9:1992 et l'ISO 31-10:1992. Elle
incorpore également les Amendements ISO 31-9:1992/Amd.1:1998 et ISO 31-10:1992/Amd.1:1998. Les
principales modifications techniques par rapport à la précédente norme sont les suivantes:
⎯ les Annexes A et B de l'ISO 31-9:1992 ont été supprimées (elles sont déjà couvertes par l'ISO 80000-9);
⎯ l'Annexe C de l'ISO 31-9:1992 est devenue l'Annexe A;
⎯ l'Annexe D de l'ISO 31-9:1992 a été supprimée;
⎯ la présentation des indications numériques a été modifiée;
⎯ les Références normatives ont été modifiées;
⎯ les éléments 10-33 et 10-53 de l'ISO 31-10:1992 ont été supprimés;
⎯ de nouveaux éléments ont été ajoutés;
⎯ de nombreuses définitions ont été reformulées;
⎯ de nouvelles valeurs de constantes fondamentales ont été utilisées.
L'ISO 80000 comprend les parties suivantes, présentées sous le titre général Grandeurs et unités:
⎯ Partie 1: Généralités
⎯ Partie 2: Signes et symboles mathématiques à employer dans les sciences de la nature et dans la
technique
⎯ Partie 3: Espace et temps
iv © ISO 2009 – Tous droits réservés

⎯ Partie 4: Mécanique
⎯ Partie 5: Thermodynamique
⎯ Partie 7: Lumière
⎯ Partie 8: Acoustique
⎯ Partie 9: Chimie physique et physique moléculaire
⎯ Partie 10: Physique atomique et nucléaire
⎯ Partie 11: Nombres caractéristiques
⎯ Partie 12: Physique de l'état solide
La CEI 80000 comprend les parties suivantes, présentées sous le titre général Grandeurs et unités:
⎯ Partie 6: Électromagnétisme
⎯ Partie 13: Science et technologies de l'information
⎯ Partie 14: Télébiométrique relative à la physiologie humaine
Introduction
0.1 Disposition des tableaux
Les tableaux des grandeurs et unités de la présente Norme internationale sont disposés de telle façon que les
grandeurs apparaissent sur les pages de gauche et les unités sur les pages correspondantes de droite.
Toutes les unités situées entre deux lignes continues sur les pages de droite correspondent aux grandeurs
situées entre les lignes continues correspondantes des pages de gauche.
Lorsque la numérotation d'une grandeur a été modifiée dans une partie révisée de l'ISO 31, le numéro utilisé
dans l'édition précédente figure entre parenthèses, sur la page de gauche, sous le nouveau numéro de la
grandeur; un tiret est utilisé pour indiquer que la grandeur en question ne figurait pas dans l'édition
précédente.
0.2 Tableaux de grandeurs
Les noms en anglais et en français des grandeurs les plus importantes relevant du domaine d'application de
la présente Norme internationale sont donnés conjointement avec leurs symboles et, dans la plupart des cas,
avec leurs définitions. Ces noms et symboles ont valeur de recommandations. Les définitions sont données
en vue de l'identification des grandeurs du Système international de grandeurs (ISQ, International System of
Quantities), énumérées sur les pages de gauche du tableau; elles ne sont pas complètes, au sens strict du
terme.
Le caractère scalaire, vectoriel ou tensoriel des grandeurs est indiqué, en particulier lorsque cela est
nécessaire pour les définir.
Dans la plupart des cas, un seul nom et un seul symbole sont donnés pour la grandeur; lorsque deux ou plus
de deux noms ou symboles sont indiqués pour une même grandeur, sans distinction spéciale, ils peuvent être
utilisés indifféremment. Lorsqu'il existe deux façons d'écrire une lettre en italique (comme c'est le cas, par
exemple, avec ϑ et θ ; ϕ et φ ; a et a; g et g), une seule façon est indiquée, ce qui ne signifie pas que l'autre
ne soit pas également acceptable. Il est recommandé de ne pas donner de significations différentes à ces
variantes. Un symbole entre parenthèses signifie qu'il s'agit d'un symbole de réserve à utiliser lorsque, dans
un contexte particulier, le symbole principal est utilisé avec une signification différente.
Dans la présente édition française, les noms de grandeurs cités en anglais sont imprimés en italique et sont
précédés de en. En français, le genre des noms est indiqué par (m) pour masculin et par (f) pour féminin,
juste après le substantif dans le nom.
0.3 Tableaux des unités
0.3.1 Généralités
Les noms des unités correspondant aux grandeurs sont donnés avec leurs symboles internationaux et leurs
définitions. Ces noms d'unités sont propres à la langue mais les symboles sont internationaux et sont les
mêmes dans toutes les langues. Pour obtenir de plus amples informations, voir la Brochure sur le SI
e
(8 édition, 2006) du BIPM et l'ISO 80000-1.
vi © ISO 2009 – Tous droits réservés

Les unités sont disposées de la façon suivante:
a) les unités cohérentes SI sont indiquées en premier. Les unités SI ont été adoptées par la Conférence
générale des poids et mesures (CGPM). L'emploi des unités cohérentes SI est recommandé; les
multiples et sous-multiples décimaux formés avec les préfixes SI sont recommandés bien qu'ils ne soient
pas mentionnés explicitement;
b) certaines unités non SI sont ensuite indiquées, à savoir celles acceptées par le Comité international des
poids et mesures (CIPM), par l'Organisation internationale de métrologie légale (OIML), ou par l'ISO et la
CEI; elles peuvent être utilisées avec les unités SI.
Ces unités non SI sont séparées des unités SI par des lignes en traits interrompus;
c) les unités non SI actuellement acceptées par le CIPM pour être utilisées avec les unités SI sont
imprimées en petits caractères (plus petits que ceux du texte) dans la colonne «Facteurs de conversion
et remarques»;
d) les unités non SI qui ne sont pas recommandées sont uniquement données dans les annexes de
certaines parties de la présente Norme internationale. Ces annexes sont informatives, en premier lieu
pour les facteurs de correction, et ne font pas partie intégrante de la norme. Ces unités déconseillées
sont classées en deux groupes:
1) les unités du système CGS ayant une dénomination spéciale;
2) les unités basées sur le foot, le pound, la seconde ainsi que certaines autres unités connexes;
e) d’autres unités non SI données pour information, concernant en particulier les facteurs de conversion,
sont indiquées dans d'autres annexes informatives de la présente Norme internationale.
0.3.2 Remarque sur les unités des grandeurs de dimension un, ou grandeurs sans dimension
L'unité cohérente pour une grandeur de dimension un, également appelée grandeur sans dimension, est le
nombre un, symbole 1. Lorsque la valeur d’une telle grandeur est exprimée, le symbole 1 de l'unité n'est
généralement pas écrit explicitement.
EXEMPLE 1 Indice de réfraction n = 1,53 × 1 = 1,53
Il ne faut pas utiliser de préfixes pour former les multiples ou les sous-multiples de l'unité un. Au lieu des
préfixes, il est recommandé d'utiliser les puissances de 10.
EXEMPLE 2 Nombre de Reynolds Re = 1,32 × 10
Considérant que l'angle plan est généralement exprimé sous forme de rapport entre deux longueurs et l'angle
solide sous forme de rapport entre deux aires, en 1995, le CGPM a décidé que, dans le SI, le radian (symbole
rad) et le stéradian (symbole sr) sont des unités dérivées sans dimension. Cela implique que les grandeurs
angle plan et angle solide sont considérées comme des grandeurs dérivées de dimension un. Les unités
radian et stéradian sont ainsi égales à un; elles peuvent être soit omises, soit utilisées dans l'expression des
unités dérivées pour faciliter la distinction entre des grandeurs de nature différente mais de même dimension.
0.4 Indications numériques dans la présente Norme Internationale
Le signe = est utilisé pour signifier «est exactement égal à», le signe ≈ est utilisé pour signifier «est
approximativement égal à» et le signe := est utilisé pour signifier «est par définition égal à».
Les valeurs numériques de grandeurs physiques déterminées expérimentalement sont toujours associées à
une incertitude de mesure qu'il convient de toujours indiquer. Dans la présente Norme internationale, la valeur
numérique de l'incertitude est représentée comme dans l'exemple suivant:
EXEMPLE l = 2,347 82(32) m.
Dans cet exemple, l = a (b) m, la valeur numérique de l'incertitude b indiquée entre parenthèses est supposée
s'appliquer aux derniers chiffres (les moins significatifs) de la valeur numérique a de la longueur l. Cette
notation est utilisée lorsque b représente l'incertitude-type (écart-type estimé) dans les deux derniers chiffres
de a. L'exemple numérique donné ci-dessus peut être interprété pour indiquer que la meilleure estimation de
la valeur numérique de la longueur l, lorsque l est exprimée en mètres, est 2,347 82 et que la valeur inconnue
de l est supposée se situer entre (2,347 82 − 0,000 32) m et (2,347 82 + 0,000 32) m avec une probabilité
déterminée par l'incertitude-type 0,000 32 m et la loi de probabilité des valeurs de l.
0.5 Remarques particulières
0.5.1 Grandeurs
Les constantes physiques fondamentales données dans l'ISO 80000-10 sont reprises des valeurs cohérentes
des constantes physiques fondamentales publiées dans «2006 CODATA recommended values». Voir le site
web de CODATA à l'adresse: http://physics.nist.gov/cuu/Constants/index.html.
0.5.2 Unités spéciales
Il convient que les scientifiques aient la liberté d'utiliser des unités non SI lorsqu'ils les jugent appropriées du
point de vue scientifique à leurs travaux. C'est la raison pour laquelle des unités non SI appropriées à la
physique atomique et nucléaire sont répertoriées dans l'Annexe A.
viii © ISO 2009 – Tous droits réservés

NORME INTERNATIONALE ISO 80000-10:2009(F)

Grandeurs
...


SLOVENSKI SIST ISO 80000-10
STANDARD
marec 2014
Veličine in enote – 10. del: Atomska in jedrska fizika

Quantities and units – Part 10: Atomic and nuclear physics

Grandeurs et unités – Partie 10: Physique atomique et nucléaire

Referenčna oznaka
ICS 01.060 SIST ISO 80000-10:2014 (sl)

Nadaljevanje na straneh od 2 do 75

© 2014-03: Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega standarda ni dovoljeno.

SIST ISO 80000-10 : 2014
NACIONALNI UVOD
Standard SIST ISO 80000-10:2014 (sl), Veličine in enote – 10. del: Atomska in jedrska fizika, 2014,
ima status slovenskega standarda in je enakovreden mednarodnemu standardu ISO 80000-10 (en),
Quantities and units – Part 10: Atomic and nuclear physics, 2009-12.

NACIONALNI PREDGOVOR
Mednarodni standard ISO 80000-10:2009 je pripravil tehnični odbor ISO/TC 12 Veličine, enote, simboli v
sodelovanju z IEC/TC 25 Veličine in enote.
Slovenski standard SIST ISO 80000-10:2014 je prevod mednarodnega standarda ISO 80000-10:2009. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni mednarodni
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC TRS
Tehnično risanje, veličine, enote, simboli in grafični simboli.
ZVEZA Z NACIONALNIMI STANDARDI
S privzemom tega mednarodnega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen standardov, ki so že sprejeti v nacionalno standardizacijo:
SIST ISO 80000-3:2012 (sl) Veličine in enote – 3. del: Prostor in čas
SIST ISO 80000-4:2012 (sl) Veličine in enote – 4. del: Mehanika
SIST ISO 80000-5:2012 (sl) Veličine in enote – 5. del: Termodinamika
SIST EN 80000-6:2008 (en,fr) Veličine in enote – 6. del: Elektromagnetizem (IEC 80000-
6:2008)
SIST ISO 80000-7:2013 (sl) Veličine in enote – 7. del: Svetloba
SIST ISO 80000-9:2013 (sl) Veličine in enote – 9. del: Fizikalna kemija in molekulska fizika

PREDHODNA IZDAJA
SIST ISO 31-9+A1:2008 (sl)  Veličine in enote – 9. del: Atomska in jedrska fizika
SIST ISO 31-9:1995/Amd.1:2001 (en) Veličine in enote – 9. del: Atomska in jedrska fizika
SIST ISO 31-10+A1:2008 (sl) Veličine in enote – 10. del: Jedrske reakcije in
ionizirajoča sevanja
SIST ISO 31-10:1995/Amd. 1:2001 (en) Veličine in enote – 10. del: Jedrske reakcije in
ionizirna sevanja
OPOMBI
– Povsod, kjer se v besedilu standarda uporablja izraz “mednarodni standard”, v
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.

SIST ISO 80000-10 : 2014
Vsebina Stran
Predgovor.4
Uvod .6
1 Področje uporabe.9
2 Zveza z drugimi standardi.9
3 Imena, simboli in definicije.9
Dodatek A (informativni): Enote zunaj sistema SI, ki se uporabljajo v atomski in jedrski fiziki .74
Literatura .75
SIST ISO 80000-10 : 2014
Predgovor
ISO (Mednarodna organizacija za standardizacijo) je svetovna zveza nacionalnih organov za
standarde (članov ISO). Mednarodne standarde navadno pripravljajo tehnični odbori ISO. Vsak član,
ki želi delovati na določenem področju, za katero je bil ustanovljen tehnični odbor, ima pravico biti
zastopan v tem odboru. Pri delu sodelujejo tudi vladne in nevladne mednarodne organizacije,
povezane z ISO. V vseh zadevah, ki so povezane s standardizacijo na področju elektrotehnike, ISO
tesno sodeluje z Mednarodno elektrotehniško komisijo (IEC).
Mednarodni standardi so pripravljeni v skladu s pravili, podanimi v Direktivah ISO/IEC, 2. del.
Osnutki mednarodnih standardov, ki jih sprejmejo tehnični odbori, se pošljejo vsem članom v
glasovanje. Za objavo mednarodnega standarda je treba pridobiti soglasje najmanj 75 % članov, ki se
udeležijo glasovanja.
Opozoriti je treba na možnost, da je lahko nekaj elementov tega dokumenta predmet patentnih pravic.
ISO ne prevzema odgovornosti za ugotavljanje istovetnosti katerihkoli ali vseh takih patentnih pravic.

Mednarodni standard ISO 80000-10 je pripravil tehnični odbor ISO/TC 12 Veličine in enote v
sodelovanju z IEC/TC 25 Veličine in enote.
Prva izdaja standarda ISO 80000-10 razveljavlja in nadomešča standarda ISO 31-9:1992 in ISO
31-10:1992. Vključuje tudi dopolnili ISO 31-9:1992/Amd.1:1998 in ISO 31-10:1992/Amd.1:1998. V
primerjavi s prejšnjima standardoma so glavne tehnične spremembe naslednje:
– izbrisana sta dodatka A in B k ISO 31-9:1992 (ker sta zajeta v ISO 80000-9);
– dodatek C k ISO 31-9:1992 je postal dodatek A;
– izbrisan je dodatek D k ISO 31-9:1992;
– spremenjeno je podajanje številskih navedb;
– spremenjene so zveze z drugimi standardi;
– izbrisani sta točki 10-33 in 10-53 iz ISO 31-10:1992;
– dodane so nove točke;
– veliko definicij je preoblikovanih;
– uporabljene so novejše vrednosti za osnovne konstante.
ISO 80000 s skupnim naslovom Veličine in enote sestavljajo naslednji deli:
– 1. del: Splošno
– 2. del: Matematični znaki in simboli za uporabo v naravoslovnih vedah in tehniki
– 3. del: Prostor in čas
– 4. del: Mehanika
– 5. del: Termodinamika
– 7. del: Svetloba
– 8. del: Akustika
– 9. del: Fizikalna kemija in molekulska fizika
– 10. del: Atomska in jedrska fizika
– 11. del: Značilna števila
– 12. del: Fizika trdne snovi
SIST ISO 80000-10 : 2014
IEC 80000 s skupnim naslovom Veličine in enote sestavljajo naslednji deli:
– 6. del: Elektromagnetizem
– 13. del: Informacijska znanost in tehnologija
– 14. del: Telebiometrija, povezana s fiziologijo človeka
SIST ISO 80000-10 : 2014
Uvod
0.1 Razvrstitev v preglednice

V tem mednarodnem standardu so veličine in enote v preglednicah razvrščene tako, da so veličine na
levih, enote pa na ustreznih desnih straneh.

Vse enote med polnima vodoravnima črtama na desni strani pripadajo veličinam med ustreznima
polnima črtama na levi strani.

Če je bila pri reviziji dela standarda ISO 31 zaporedna številka veličine spremenjena, je številka iz
prejšnje izdaje navedena v oklepaju na levi strani pod novo številko veličine; pomišljaj pomeni, da
prejšnja izdaja ni vsebovala te veličine.

0.2 Preglednice veličin
Imena najpomembnejših veličin v tem mednarodnem standardu so podana skupaj s svojimi simboli in
največkrat tudi z definicijami. Ta imena in simboli so priporočila. Definicije so podane samo za
opredelitev veličin v mednarodnem sistemu veličin (ISQ), navedenih na levih straneh preglednice, in
niso nujno popolne.
Skalarni, vektorski in tenzorski značaj nekaterih veličin je prikazan, zlasti kadar je potreben za
definicijo.
Večina veličin ima podano samo eno ime in samo en simbol; če sta za eno veličino podani dve imeni
ali več oziroma dva simbola ali več in razlika ni opredeljena, so enakovredni. Kadar obstajata dva tipa
poševnih črk (kot npr. ϑ in θ; ϕ in φ; a in a; g in g), je uporabljen samo eden. To ne pomeni, da drugi
ni enako sprejemljiv. Takšnim različicam ni priporočljivo pripisovati različnih pomenov. Če je simbol v
oklepaju, pomeni da je "rezervni" in se v besedilu uporablja takrat, kadar ima glavni simbol drugačen
pomen.
V angleški izdaji so francoska imena veličin v poševnem tisku, pred njimi pa stoji oznaka fr. Spol je pri
francoskem imenu označen z oznako (m) za moški in (f) za ženski spol, ki stoji neposredno za
samostalnikom v francoskem imenu.

0.3 Preglednice enot
0.3.1 Splošno
Imena enot za ustrezne veličine so podana skupaj z mednarodnimi simboli in definicijami. Ta imena
enot so odvisna od jezika, simboli pa so mednarodni in enaki v vseh jezikih. Več informacij o tem
najdete v Brošuri SI (8. izdaja, 2006), ki jo je izdal BIPM, in v ISO 80000-1.

Enote so razporejene na naslednji način:
a) Najprej so podane koherentne enote SI. Enote SI so bile sprejete na Generalni konferenci za
uteži in mere (Conférence Générale des Poids et Mesures, CGPM). Priporoča se uporaba
koherentnih enot SI; desetiški večkratniki in manjkratniki, ki se tvorijo s predponami SI, se
priporočajo, tudi če niso posebej navedeni.
b) Sledi nekaj enot, ki niso enote SI, a so jih za uporabo skupaj z enotami SI sprejeli Mednarodni
odbor za uteži in mere (Comité International des Poids et Mesures, CIPM) ali Mednarodna
organizacija za zakonsko meroslovje (Organisation Internationale de Métrologie Légale, OIML) ali
ISO in IEC.
Take enote so od ustreznih enot SI ločene s črtkano vodoravno črto.
c) Enote, ki niso enote SI in jih CIPM trenutno dovoljuje za uporabo skupaj z enotami SI, so v
stolpcu "Pretvorniki in opombe" natisnjene z manjšimi črkami kot drugo besedilo.
SIST ISO 80000-10 : 2014
d) Enote zunaj sistema SI, ki se ne priporočajo, so podane samo v dodatkih k nekaterim delom tega
mednarodnega standarda. Ti dodatki so informativni, namenjeni predvsem pretvornikom, in niso
sestavni del standarda. Te odsvetovane enote so razvrščene v dve skupini:
1) enote s posebnimi imeni v sistemu CGS;
2) enote, ki temeljijo na enotah čevelj, funt, sekunda, ter nekatere druge sorodne enote.
e) Druge enote, ki niso enote SI in so podane za informacijo, zlasti glede pretvornikov, so navedene
v informativnih dodatkih k nekaterim delom tega mednarodnega standarda.
0.3.2 Opomba glede enot veličin z dimenzijo ena oziroma brezdimenzijskih veličin

Koherentna enota za katerokoli veličino z dimenzijo ena, ki se imenuje tudi brezdimenzijska veličina,
je število ena, simbol 1. Pri izražanju vrednosti takšne veličine se simbol enote 1 navadno ne piše.
1. PRIMER: Lomni količnik n = 1,53 × 1 = 1,53

Za večkratnike in manjkratnike te enote se predpone ne uporabljajo. Namesto predpon se priporoča
uporaba potenc števila 10.
2. PRIMER: Reynoldsovo število Re = 1,32 × 10

Ker je ravninski kot na splošno izražen z razmerjem med dvema dolžinama in prostorski kot z
razmerjem med dvema ploščinama, je CGPM leta 1995 določil, da sta v mednarodnem sistemu enot
radian, rad, in steradian, sr, brezdimenzijski izpeljani enoti. Torej se veličini ravninski kot in prostorski
kot obravnavata kot izpeljani veličini z dimenzijo ena. Enoti radian in steradian sta tako enaki ena;
lahko se izpustita ali pa uporabljata v izrazih za izpeljane enote, da je laže razlikovati med veličinami
različne vrste, vendar enake dimenzije.

0.4 Številske navedbe v tem mednarodnem standardu

Znak = se uporablja za označevanje, da "je točno enako", znak ≈ se uporablja za označevanje, da "je
približno enako" in znak : se uporablja za označevanje, da "je po definiciji enako".
=
Številske vrednosti fizikalnih veličin, ki so bile eksperimentalno določene, imajo vedno pripadajočo
merilno negotovost. Ta negotovost se vedno navede. V tem mednarodnem standardu se velikost
negotovosti izrazi tako, kot kaže naslednji primer.
PRIMER: l = 2,347 82(32) m
V tem primeru, l = a(b) m, se številska vrednost negotovosti b, navedena v oklepaju, domnevno
nanaša na zadnje (in najmanj pomembne) števke številske vrednosti a dolžine l. Ta zapis se uporabi,
kadar b izraža standardno negotovost (ocenjeni standardni odklon) v zadnjih števkah vrednosti a.
Zgoraj navedeni številski primer se lahko razlaga, kot da pomeni, da je najboljša ocena številske
vrednosti dolžine l (če je l izražena v enoti meter) 2,347 82, in da je neznana vrednost l domnevno
med (2,347 82 – 0,000 32) m in (2,347 82 + 0,000 32) m, s tem da je verjetnost določena s
standardno negotovostjo 0,000 32 m in porazdelitvijo verjetnosti vrednosti l.

0.5 Posebne opombe
0.5.1 Veličine
Osnovne fizikalne konstante, podane v ISO 80000-10, so navedene v usklajenih vrednostih osnovnih
fizikalnih konstant, objavljenih v "priporočenih vrednostih CODATA 2006". Glejte tudi spletno stran
CODATA: http://physics.nist.gov/cuu/constants/index.html.
SIST ISO 80000-10 : 2014
0.5.2 Posebne enote
Posamezni znanstveniki naj imajo možnost svobodne uporabe enot zunaj sistema SI, če v tem vidijo
posebno znanstveno prednost pri svojem delu. Iz tega razloga so v dodatku A navedene enote zunaj
sistema SI, ki so pomembne za področje atomske in jedrske fizike.

SIST ISO 80000-10 : 2014
Veličine in enote – 10. del: Atomska in jedrska fizika

1 Področje uporabe
ISO 80000-10 podaja imena, simbole in definicije za veličine in enote atomske in jedrske fizike. Kjer je
primerno, so podani tudi pretvorniki (pretvorni faktorji).

2 Zveza z drugimi standardi
Za uporabo tega dokumenta so nujno potrebni spodaj navedeni standardi. Pri datiranem sklicevanju
se upošteva samo navedena izdaja. Pri nedatiranem sklicevanju se upošteva zadnja izdaja
navedenega dokumenta (vključno z morebitnimi dopolnili).

ISO 80000-3:2006 Veličine in enote – 3. del: Prostor in čas
ISO 80000-4:2006 Veličine in enote – 4. del: Mehanika
ISO 80000-5:2007 Veličine in enote – 5. del: Termodinamika
IEC 80000-6:2008 Veličine in enote – 6. del: Elektromagnetizem
ISO 80000-7:2008 Veličine in enote – 7. del: Svetloba
ISO 80000-9:2009 Veličine in enote – 9. del: Fizikalna kemija in molekulska fizika
3 Imena, simboli in definicije

Imena, simboli in definicije za veličine in enote v atomski in jedrski fiziki so podani na naslednjih
straneh.
SIST ISO 80000-10 : 2014
ATOMSKA IN JEDRSKA FIZIKA VELIČINE
Zap. št. Ime Simbol Definicija Opombe
10-1.1 atomsko Z število protonov v Nuklid je vrsta atoma z določenim
(9-1)  število, atomskem jedru številom protonov in nevtronov.

protonsko
število
Nuklidi z isto vrednostjo Z, a
(vrstno
z različnimi vrednostmi N, se
...

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