Half-lives and gamma rays of tin isotopes of masses 129, 130, 131 and 132

Abstract

The half-lives of fission-produced tin 129–132 have been determined. The assignment of the different half-lives to the various tin isotopes was based on comparison with the literature values for half-lives, the energies as found by the ^128,130Te(d, ³He)^127,129Sb reactions, and yield calculations. The half-lives obtained were: 2·52±0·12 min for ¹²⁹Sn; 3·69±0·07 min for ¹³⁰Sn; 62·9±2·5 sec for ¹³¹Sn; 41·1±1·3 sec for ¹³²Sn. The following gamma energies were found, (the abundances relative to the 192·2 keV line are given in brackets): for ¹²⁹Sn-642·0 keV (16·9%); for ¹³⁰Sn-69·5 keV (32·1%), 192·2 keV (100%), 228·0 keV (27·1%), 435·0 keV (8·7%), 738·0 keV (9·9%) and 776·0 keV (43·4%); for ¹³¹Sn-448·4 keV (50·6%); for ¹³²Sn-84·7 keV (63·5%), 245·8 keV (60·5%) and 340·0 keV (74·0%).