BS-5775-9-1993 ISO-31-9-1992.pdf
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1、BRITISH STANDARD BS 5775-9: 1993 ISO 31-9:1992 Specification for Quantities, units and symbols Part 9: Atomic and nuclear physics UDC 389.15.16:539.1:006.72 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:59:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-9:1993 This British Standard
2、, having been prepared under the direction of the Systems Department Steering Committee, was published under the authority of the Standards Board and comes into effect on 15 March 1993 BSI 06-1999 First published September 1982 Second edition March 1993 The following BSI references relate to the wor
3、k on this standard: Committee reference S/1 Draft for comment 90/54953 DC ISBN 0 580 22002 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Systems Department Steering Committee (S/-) to Technical Committee S/1, upon which the following
4、 bodies were represented: Chartered Institution of Building Services Engineers Department of Trade and Industry (National Physical Laboratory) Department of Trade and Industry (National Weights and Measures Laboratory) EEA (The Association of Electronics, Telecommunications and Business Equipment In
5、dustries) Institute of Physics Institute of Trading Standards Administration Institution of Chemical Engineers Institution of Electrical Engineers Institution of Mechanical Engineers Institution of Structural Engineers Royal Society Royal Society of Chemistry Schools Mathematics Project Society of C
6、hemical Industry Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:59:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-9:1993 BSI 06-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1S
7、cope2 2Names and symbols2 Annex A (normative) Names and symbols of the chemical elements16 Annex B (normative) Symbols for chemical elements and nuclides19 Annex C (informative) Original names and symbols for nuclides of radioactive series20 Annex D (informative) Examples of relations in different s
8、ystems of equations21 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:59:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-9:1993 ii BSI 06-1999 National foreword This Part of BS 5775 has been prepared under the direction of the Systems Department St
9、eering Committee. It is identical with ISO 31-9:1992 Quantities and units Part 9: Atomic and nuclear physics, published by the International Organization for Standardization (ISO). ISO 31-9 was prepared by Technical Committee ISO/TC 12 “Quantities, units, symbols, conversion factors” with the active
10、 participation and approval of the UK. This Part of BS 5775 supersedes BS 5775-9:1982, which is withdrawn. The principal changes made in this revised version are as follows: a) the decision by the International Committee for Weights and Measures (Comit International des Poids et Mesures, CIPM) in 19
11、80 concerning the status of supplementary units has been incorporated; b) one new item has been added; c) a number of new chemical elements have been added in Annex A; d) units in use temporarily have been transferred to the “Conversion factors and remarks” column. BS 5775 comprises the following Pa
12、rts, each of which is identical with the corresponding Part of ISO 31. Part 0: General principles; Part 1: Space and time; Part 2: Periodic and related phenomena; Part 3: Mechanics; Part 4: Heat; Part 5: Electricity and magnetism; Part 6: Light and related electromagnetic radiations; Part 7: Acousti
13、cs; Part 8: Physical chemistry and molecular physics; Part 9: Atomic and nuclear physics; Part 10: Nuclear reactions and ionizing radiations; Part 11: Mathematical signs and symbols for use in the physical sciences and technology; Part 12: Characteristic numbers; Part 13: Solid state physics. A Brit
14、ish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
15、t cover, an inside front cover, pages i and ii, pages 1 to 22, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun shef
16、fieldun, na, Fri Dec 01 09:59:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 31-9:1992(E) BSI 06-19991 Introduction 0.1 Arrangement of the tables The tables of quantities and units in ISO 31 are arranged so that the quantities are presented on the left-hand pages and the units on the correspondin
17、g right-hand pages. All units between two full lines 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 parentheses on the left-hand
18、 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 most important quantities within the field of this document are given together with their symbols and, in most cases, definitions. T
19、hese definitions are given merely for identification; they are not intended to be complete. The vectorial character of some quantities is pointed out, especially when this is needed for the definitions, but no attempt is made to be complete or consistent. In most cases only one name and only one sym
20、bol 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 (sloping) letter exist (for example as with , ; , ; g, g) only one of these is given. This does not mea
21、n that the other is not equally acceptable. In general it is recommended that such variants should 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. 0.3 Tab
22、les of units 0.3.1 General Units for the corresponding quantities are given together with the international symbols and the definitions. For further information, see ISO 31-0. The units are arranged in the following way: a) The names of the SI units are given in large print (larger than text size).
23、The SI units have been adopted by the General Conference on Weights and Measures (Conference Gnrale des Poids et Mesures, CGPM). The SI units and their decimal multiples and sub-multiples are recommended, although the decimal multiples and sub-multiples are not explicitly mentioned. b) The names of
24、non-SI units which may be used together with SI units because of their practical importance or because of their use in specialized fields are given in normal print (text size). These units are separated by a broken line from the SI units for the quantities concerned. c) The names of non-SI units whi
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