Quantities and units - Part 10: Atomic and nuclear physics (ISO 80000-10:2009)

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.

Größen und Einheiten - Teil 10: Atom- und Kernphysik (ISO 80000-10:2009)

ISO 80000 10 enthält Benennungen, Formelzeichen und Definitionen für Größen und Einheiten, die in der Atom- und Kernphysik verwendet werden. Wo benötigt, sind auch Umrechnungsfaktoren aufgeführt.

Grandeurs et unités - Partie 10: Physique atomique et nucléaire (ISO 80000-10:2009)

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 (ISO 80000-10:2009)

Standard ISO 80000-10:2009 podaja imena, simbole in definicije za veličine in enote, ki se uporabljajo v atomski in jedrski fiziki. Kjer je primerno, so navedeni tudi pretvorniki (pretvorni faktorji).

General Information

Status
Withdrawn
Publication Date
02-Apr-2013
Withdrawal Date
08-Oct-2019
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
09-Oct-2019

Relations

Buy Standard

Standard
EN ISO 80000-10:2013
English language
78 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 80000-10:2013
01-junij-2013
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 ,62
Quantities and units - Part 10: Atomic and nuclear physics (ISO 80000-10:2009)
Größen und Einheiten - Teil 10: Atom- und Kernphysik (ISO 80000-10:2009)

Grandeurs et unités - Partie 10: Physique atomique et nucléaire (ISO 80000-10:2009)

Ta slovenski standard je istoveten z: EN ISO 80000-10:2013
ICS:
01.060 9HOLþLQHLQHQRWH Quantities and units
07.030 Fizika. Kemija Physics. Chemistry
SIST EN ISO 80000-10:2013 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 80000-10:2013
---------------------- Page: 2 ----------------------
SIST EN ISO 80000-10:2013
EUROPEAN STANDARD
EN ISO 80000-10
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 01.060
English Version
Quantities and units - Part 10: Atomic and nuclear physics (ISO
80000-10:2009)

Grandeurs et unités - Partie 10: Physique atomique et Größen und Einheiten - Teil 10: Atom- und Kernphysik (ISO

nucléaire (ISO 80000-10:2009) 80000-10:2009)
This European Standard was approved by CEN on 14 March 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80000-10:2013: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 80000-10:2013
EN ISO 80000-10:2013 (E)
Contents Page

Foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 80000-10:2013
EN ISO 80000-10:2013 (E)
Foreword

The text of ISO 80000-10:2009 has been prepared by Technical Committee ISO/TC 12 “Quantities and units”

of the International Organization for Standardization (ISO) and has been taken over as EN ISO 80000-

10:2013.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by October 2013, and conflicting national standards shall be withdrawn at

the latest by October 2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 80000-10:2009 has been approved by CEN as EN ISO 80000-10:2013 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 80000-10:2013
---------------------- Page: 6 ----------------------
SIST EN ISO 80000-10:2013
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 80000-10:2009(E)
ISO 2009
---------------------- Page: 7 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
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.

COPYRIGHT PROTECTED DOCUMENT
© 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
---------------------- Page: 8 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
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

© ISO 2009 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
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
---------------------- Page: 10 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
⎯ 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
© ISO 2009 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
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

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
---------------------- Page: 12 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)

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

© ISO 2009 – All rights reserved vii
---------------------- Page: 13 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)

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
---------------------- Page: 14 ----------------------
SIST EN ISO 80000-10:2013
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.
© ISO 2009 – All rights reserved 1
---------------------- Page: 15 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
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

(9-1)
proton number atomic nucleus specified numbers of protons and
neutrons.
fr numéro (m)
atomique,
Nuclides with the same value of Z
nombre (m) de
but different values of N are called
protons
isotopes of an element.
The ordinal number of an element in
the periodic table is equal to the
atomic number.
The atomic number equals the charge
of the nucleus in units of the
elementary charge (item 10-5.1).

10-1.2 neutron number N number of neutrons in an Nuclides with the same value of N

(9-2) atomic nucleus
but different values of Z are called
fr nombre (m) de
isotones.
neutrons
NZ− is called the neutron excess
number.
10-1.3 nucleon number, number of nucleons in an
A AZ=+N
(9-3)
mass number atomic nucleus
Nuclides with the same value of A are
fr nombre (m) de
called isobars.
nucléons,
nombre (m) de
masse
10-2 rest mass, m()X , for particle X, mass Specifically,
(9-5.1) proper mass (ISO 80000-4:2006, item
for an electron:
(9-5.2) 4-1) of that particle at rest
−31
fr masse (f) au
m=×9,109 382 15(45) 10 kg;
(9-5.3)
repos,
for a proton:
masse (f)
−27
propre
m=×1,672 621 637(83) 10 kg;
for a neutron:
−27
m=×1,674 927 211(84) 10 kg
[2006 CODATA recommended
values].
Rest mass is often denoted m .
10-3 rest energy
for a particle,
(—)
fr énergie (f) au E =mc
000
repos
where m is the rest mass
(item 10-2) of that particle,
and c is the speed of
light in vacuum
(ISO 80000-7:2008, item
7-4.1)
2 © ISO 2009 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
UNITS ATOMIC AND NUCLEAR PHYSICS
Item No. Name Symbol Definition Conversion factors and remarks
10-1.a one 1 See the Introduction, 0.3.2.
10-2.a kilogram kg
10-2.b dalton, Da 1 dalton is equal to 1/12 times
1 Da = 1 u =
–27
unified atomic the mass of a free carbon 12
1,660 538 782(83) × 10 kg
mass unit atom, at rest and in its ground
[2006 CODATA recommended
state
values].
10-3.a joule J
(continued)
© ISO 2009 – All rights reserved 3
---------------------- Page: 17 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
ATOMIC AND NUCLEAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
10-4.1 atomic mass, rest mass
m()X , m
is called the relative atomic
(9-4.1)
nuclidic mass (ISO 80000-4:2006, item
4-1) of a neutral atom or a
fr masse (f)
mass.
nuclide X in the ground
atomique,
state
masse (f)
nucléidique
–27
10-4.2 unified atomic 1/12 of the mass
m m = 1,660 538 782(83) × 10 kg
u u
(9-4.2) mass constant (ISO 80000-4:2006, item
[2006 CODATA recommended
4-1) of a neutral atom of
values].
fr constante (f)
the nuclide C in the
unifiée de
ground state at rest
masse
atomique
–19
10-5.1 elementary negative of electric charge
e = 1,602 176 487(40) × 10 C
(9-6)
charge (IEC 80000-6:2008,
[2006 CODATA recommended
item 6-2) of the electron
values].
fr charge (f)
élémentaire

10-5.2 charge number, for a particle, the electric A particle is said to be electrically

(—) ionization charge neutral if its charge number is equal
number (IEC 80000-6:2008, item to zero.
6-2) divided by the The charge number of a particle can
fr nombre (m) de
elementary charge (item be positive, negative, or zero.
charge,
10-5.1) The state of charge of a particle may
charge (f)
be presented as a superscript to the
ionique
symbol of that particle, e.g.
+++3=+ − 3−
H , He , Al , Cl , S , N
–34
10-6.1 Planck constant elementary quantum of
h h = 6,626 068 96(33) × 10 J s
(9-7) action (ISO 80000-4:2006,
[2006 CODATA recommended
fr constante (f)
item 4-37)
values].
de Planck
Energy E of harmonic vibration of
frequency f can change for
multiples of ∆=Ehf=�ω only.
–34
10-6.2 reduced Planck �
h � = 1,054 571 628(53) × 10 J s
(—) constant
[2006 CODATA recommended
values].
fr constante (f)
where h is the Planck
de Planck
� is sometimes known as hbar or the
constant (item 10-6.1)
réduite
Dirac constant.
4 © ISO 2009 – All rights reserved
---------------------- Page: 18 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
UNITS ATOMIC AND NUCLEAR PHYSICS
Item No. Name Symbol Definition Conversion factors and remarks
10-4.a kilogram kg
10-4.b dalton, Da, u 1 dalton is equal to 1/12 times
1 Da = 1 u =
–27
unified atomic the mass of a free carbon 12
1,660 538 782(83) × 10 kg
mass unit atom, at rest and in its ground
[2006 CODATA recommended
state
values].
10-5.a coulomb C
10-6.a joule second J · s
(continued)
© ISO 2009 – All rights reserved 5
---------------------- Page: 19 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
ATOMIC AND NUCLEAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
2 –10
10-7 Bohr radius
a a = 0,529 177 208 59(36) × 10 m
4πε �
0 0
(9-8)
a =
fr rayon (m) de 2 [2006 CODATA recommended
values].
Bohr
where ε is the electric
The radius of the electron orbital in
constant
the H-atom in its ground state is a in
(IEC 80000-6:2008, item
the Bohr model of the atom.
6-14.1),
� is the reduced Planck
constant (item 10-6.2),
m is the rest mass of
electron (item 10-2), and
e is the elementary
charge (item 10-5.1)
10-8 Rydberg constant 2
R R =
∞ e ∞
(9-9) R =
∞ –1
fr constante (f) 10 973 731,568 527(73) m
8πε ahc
00 0
[2006 CODATA recommended
de Rydberg
where e is the elementary
values]
charge (item 10-5.1),
R=⋅R hc
The quantity is called
y ∞ 0
ε is the electric constant
Rydberg energy.
(IEC 80000-6:2008, item
6-14.1),
a is the Bohr radius (item
10-7),
h is the Planck constant
(item 10-6.1), and
c is the speed of light in
vacuum
(ISO 80000-7:2008, item
7-4.1)
–18
10-9 Hartree energy
E , E E = 4,359 743 94(22) × 10 J
H h e H
(9-10) E =
[2006 CODATA recommended
fr énergie (f) de
4πε a
values].
Hartree
where e is the elementary
The energy of the electron in
charge (item 10-5.1),
H-atom in its ground state is −E .
ε is the electric constant
(IEC 80000-6:2008, item
E=⋅2Rhc .
H0∞
6-14.1), and
a is the Bohr radius (item
10-7)
6 © ISO 2009 – All rights reserved
---------------------- Page: 20 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
UNITS ATOMIC AND NUCLEAR PHYSICS
Item No. Name Symbol Definition Conversion factors and remarks
–10
10-7.a metre m ångström (Å), 1 Å := 10 m
10-8.a metre to the
power minus
one
10-9.a joule J
(continued)
© ISO 2009 – All rights reserved 7
---------------------- Page: 21 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
ATOMIC AND NUCLEAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks

10-10.1 magnetic dipole for a particle or nucleus, For an atom or nucleus, this energy is

(9-11.1)
moment vector quantity causing an quantized and may be written as
increment
Wg= µMB
fr moment (m)
∆=W - µB⋅
magnétique
where g is the appropriate g-factor
to its energy W
(item 10-15.1 or item 10-15.2),
(ISO 80000-5:2007, item
is mostly the Bohr magneton or
5-20.1) in an external X
nuclear magneton (item 10-10.2 or
magnetic field with
item 10-10.3), M is the magnetic
magnetic flux density B
(IEC 80000-6:2008, item
quantum number (item 10-14.4), and
6-21)
B is the magnitude of the magnetic
flux density.
See also IEC 80000-6:2008, item
6-23.
–26 –1
10-10.2
Bohr magneton
µ e� µ = 927,400 915(23) × 10 J T
µ =
(9-11.2) B
[2006 CODATA recommended
fr magnéton (m) 2m
values].
de Bohr
where e is the elementary
µ is magnetic moment of an
charge (item 10-5.1), and
electron in a state with orbital
m is the rest mass of
quantum number l = 1 (item 10-14.3)
electron (item 10-2)
due to its orbital motion.
–27 –1
10-10.3 nuclear magneton
µ µ = 5,050 783 24(13) × 10 J T
Ν Ν
µ =
(9-11.3)
[2006 CODATA recommended
fr magnéton (m) 2m
values].
nucléaire
where e is the elementary
Subscript N stands for nucleus. For
charge (item 10-5.1), and
the neutron magnetic moment,
m is the rest mass of
p subscript n is used. The magnetic
proton (item 10-2)
moments of protons or neutrons differ
from this quantity by their specific
g-factors (item 10-15.2).
10-11 spin internal angular Spin is an additive vector quantity.
(—) momentum
fr spin (m)
(ISO 80000-4:2006, item
4-12) of a particle or a
particle system
8 © ISO 2009 – All rights reserved
---------------------- Page: 22 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
UNITS ATOMIC AND NUCLEAR PHYSICS
Item No. Name Symbol Definition Conversion factors and remarks
10-10.a ampere square
A · m
metre
2 –1
10-11.a kilogram metre
kg · m · s
squared per
second
(continued)
© ISO 2009 – All rights reserved 9
---------------------- Page: 23 ----------------------
SIST EN ISO 80000-10:2013
ISO 80000-10:2009(E)
ATOMIC AND NUCLEAR PHYSICS QUANTITIES
Item No. Name Symbol Definition Remarks
10-12 total angular vector quantity in a In atomic and nuclear physics, orbital
(—) momentum quantum microsystem angular momentum is usually
composed of angular
denoted by l or L instead of Λ.
fr moment (m)
momentum Λ
cinétique
The magnitude of J is quantized so
(ISO 80000-4:2006, item
total 22
that Jj=+�j 1 , where j is the
4-12) and spin s (item
total angular momentum quantum
10-11)
number (item 10-14.6).
Total angular momentum and
magnetic dipole moment have the
same direction.
j is not the magnitude of the total
angular momentum J but its
projection onto the quantization axis,
divided by �.
10-13.1 gyromagneti
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.