Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory Title TABLE OF NUCLIDES Permalink https://escholarship.org/uc/item/42d5w3v0 Author Shirley, V.S. Publication Date 2008-12-02 eScholarship.org Powered by the California Digital Library University of California LBL-l 0436 C.,; Preprint Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA Prepared for publication in the book Nuclear and Radiochemistry (3rd Edition); Gerhart Friedlander, Joseph W. Kennedy, Edward S. Macias, and Julian Malcolm Miller, John Wiley and Sons, Inc., New York (1980) RECEIVED LAVv'RENCE BERr,ELEY LABORATORY TABLE OF NUCLIDES MAR 2 8 1980 V. S. Shirley and C. M. Lederer LIBRARY t'\Nu CJ(XUMENTS SECTIOit January 1980 TWO-WEEK LOAN COpy This is a Library Circulating Copy r which may be borrowed for two weeks. For a personal retention copy, call Tech. Info. Division, Ext. 6782. () 'I­ I Prepared for the U.S. Department of Energy under Contract W-7405-ENG-48 LBL-10436 TABLE OF NUCLIDES v. S. Shirley C. M. Lederer Isotopes Project Nuclear Science Division Lawrence Berkeley Laboratory University of California Berkeley, California 94720 January 1980 TABLE OF NUCLIDES V.S. Shirley C.M. Lederer This table presents properties of nuclides, both stable and radioactive, adopted from the 7 th edition of the Table of Isotopes. i The data are based on experimental results reported in the literature, with the cutoff date varying from January to December, 1977. (The earliest date refers to the lightest nuclides, and vice versa.) Most mass excesses are from the 1977 Atomic Mass Evaluation,2 with some recent experimental values added. F'or a few of the very unstable nuclides for which no values were reported in the 1977 Atomic Mass Evaluation, estimates are taken from the tables of W.O. Myers.3 Natural isotopic abundances4 and neutron cross sections5 are taken from compilations by N.E. Holden. F'or other references, original data, and information on the data measurements, the reader is referred to reference 1. Column 1, Nuclide: Nuclides are listed in order of increasing atomic number (Z), and are subordered by increasing mass number (A). All isotopic species with half-lives longer than about 1 s are included, as are the few shorter lived ground states, fission isomers, and "historic" isomers (e.g., 24mNa). Isotopes in reference 1 with ambiguous or very uncertain assignments, or whose assignments are probably in error (class "G"), have been omitted. Also not included are those nuclides identified in nuclear reactions, but for which radioactive decay has not been observed (class "R" in reference 1). Isomeric states aroe denoted by the conventional symbols m, m i , m 2, etc. Identical mass assignments (with no "m") for several species indicate that the relative positions of the isomers are unknown. Column 2, t1/2 or abundance: Half-lives are given in plain type, natural isotopic abundances in italics. Half-lives are rounded so that the uncertainty is ~5 units in the last place. A question mark following the half-life indicates that the assignment of the half-life (and other measured decay properties) to the listed values of Z and A is rather uncertain (nuclides with class "F''' in reference 1). Abundances are also rounded to an uncertainty of :$5 units in the last place, although the uncertainties are not well known. (Note that, because of the rounding, the abundances for an element do not always add to exactly 100%.) F'or additional information on abundances observed in specific sources and variations in abundances, the reader is referred to references 1 and 4. Column 3, Decay Mode: (3- rregative beta decay (3+ and/or EC positive beta decay. The entry of these modes alone or in various combinations involves the following conventions -- f3+ ,EC or FC,p+: both (3+ and EC have been shown experimentally to occur, with the first-named mode probably dominant from theoretical considerations (percentage branchings are given when known -- e.g., EC 90%,(3+ 10%); (3+: (3+ has been observed or inferred from genetic relationships, with EC probably :$1% from theoretical considerations (vice versa for EC); (3+ +EC or EC+(3+: the first-named mode has been observed or inferred from genetic relationships; the second mode is probably <1% from theoretical considerations. IT isomeric transition b'-ray and conversion-electron decay) a alpha decay SF' spontaneous fission (listed only if branching by this mode is ;(;1%) 53m P direct proton decay ( Co) rrrr double negatron emission rrn "delayed" neutron emission following (3- decay to unbound states. Other delayed particle-emission modes include (3-0:., (3+p, (3+0:., (3+SF', etc. 20, no:., etc. various decay modes for particle-unstable nuclides. Decay modes inferred from the means of production are enclosed in square brackets. F'or nuclides that decay by more than one mode, branching ratios are given if known; they are rounded so that the uncertainty is ~5 units in the last place. -i- Column 4, Ii: Mass excesses are given in MeV, with li(izC) defined as zero. Values are quoted to the number of significant figures implied in reference 2, except that very precise values have been rounded to the nearest keV. An appended s denotes a mass excess estimated from systematic considerations. Column 5, J7T: Spin and parity assignments without parentheses are definite; assignments in parentheses are probable. Values enclosed in square brackets are inferred from systematics. Column 6, un: 24 2 Neutron cross sections are given in b (barn=10- cm ); and, in the absence of additional notation, refer to thermal neutron capture cross sections [uc=u(n,y)] at a neutron velocity of 2200 m/s (E=0.0253 eV, or T=293 OK). A superscript sc following the value indicates a cross-section measurement with "subcadmium" neutrons, those with energy ;S0.5 eV to which a cadmium absorber is "opaque"; the superscript rs refers to "reactor spectrum" neutrons, with an energy spectrum that is not well defined but which is approximately characteristic of a "thermal" irradiation position in a reactor. The subscripts f (fission), a (totEd absorption), no: [u(n,a)], and np [u(n,p)] identify cross sections other than the capture cross section. m and 9 as subscripts stand for "metastable" and "ground", and are used wherever separate cross sections are reported for capture to ground and isomeric states. For those cases for which a single total cross section includes both direct capture and indirect capture via the isomeric states, the subscript g+m is used. For additional details, the reader is referred to reference 1. References 1) Table of Isotopes, 7 lh edition: C.M. Lederer and V.S. Shirley, editors; E. Browne, J.M. Dairiki, and R.E. Doebler, principal authors; A.A. Shihab-Eldin, L.J. Jardine, J.K. Tuli, and A.B. Buyrn, authors, John Wiley and Sons, Inc., New York (1978). 2) A.H. Wapstra and K. Bos, Atomic Data and Nucl. Data Tables 19, 175(1977) and 20, 1(1977); Errata: Atomic Data and Nucl. Data Tables 20, 126(1977). 3) W.D. Myers, Droplet Model of Atomic Nuclei, IFI/Plenum Data Company, New York (1977); see also: Atomic Data and Nucl. Data Tables 17,474 (1976). 4) N.E. Holden, Brookhaven National Laboratory Report No. BNL~NCS-50605, 1977 (unpublished). 5) N.E. Holden, private communication to C.M. Lederer and V.S. Shirley (1977). Work performed under the auspices of the U.S. Department of Energy. Additional funding provided by the U.S. National Bureau of Standards, Office of Standard Reference Data. -ii- TABLE OF NUCLIDES Nuclide Abundance Decay "'(MeV) J7T an(b) Z EI A or t 1/ 2 Mode 0 n 1 10.6 m fJ' ,no l' B.071 1/2+ I H 1 99.985% 7.2B9 1/2+ 0.332 2 0.0148% 13.156 1+ 5.2x10-4 3 12.33 Y fJ' ,no )' 14.950 1/2+ <6xl0'6'" 2 He 3 I. 38x10"% 14.931 1/2+ 5.33x10J no 4 99.99986% 2.425 0+ 6 O.BOB fJ' ,no l' 17.597 0+ B 0.122 fJ' ,fJ-n 12% 31.609 o· 3 Li 6 7.5% 14.0B7 1+ 942 no 7 92.5% 14.90B 3/2- 0.045 " B 0.B4 s fJ-20. 20.947 2+ 9 0.17B s fJ' ,fJ'n20. 35% 24.955 0/2)- 11 B.5 ms fJ',fJ-n 61% 40.94 4 Be 7 5.3 . .3 a EC 15.770 3/2- 5)(104~~ 9 100% 11 . .34B 3/2- 0.008 6 10 1.6, :0 y fJ- ,no l' 12.608 0+ <0.001 " 11 13.8 s (3- ,fJ-o. .3% 20.176 1/2+ 12 11.4 ms (3' ,fJ'n 25.03 0+ 5 B B 0. 769 S 6+20. 22.922 2+ 10 /9.8% 12.052 3+ 3838 no 11 80.2% 8.668 3/2- 0.005 " 12 20.4 nos (3- ,(3- 30. 1.6% 13.370 1+ 13 17.4 nos S-,fJ-n 0.28% ' 6.562 3/2- 14 16 ms 13- 23.657 2- 6 C 9 0.1265 5 (3'p20. 28.9: 2 (3/2-) 10 19.2 s (3' 15.703 O· (3' 99.76%, 11 20.38 m 10.650 3/2- EC 0.2 4%,00 l' 12 98.89% 0 0+ 0.0034 13 !. /~% 3. 1 25 1/2- 9>: 1O~A 6 14 573(, , (3' ,no l' .3.020 0+ < 1;K 10- fS 15 2.449 s 13- 9.8"3 1/2+ 16 O.7S s (3'n >98.8% 13.693 0+ 7 N 12 11.0 ms {3',(3'3o.3.5% 17.338 1+ 13 9.% m {3' ,no l' 5.346 1/2- 14 99.6,J% 2.863 1+ 1.82 ~~ 15 0.366;;; 0.102 1/2- 4x10-5 rs 16 ' .