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

Discovery of the calcium, indium, tin, and platinum isotopes

“…Since its excitation curve is almost identical with that of the 66 min In 110 , produced by the Ag 107 (α, n) In 110 reaction, the 23 min period must be assigned to mass number 112 as the product of the Ag 109 (α, n) In 112 reaction''. These half-lives are consistent with the currently accepted values of 2.8047(4) days and 20.56(6) min, for 111 In and 112 In, respectively. The half-life for 112 In corresponds to an isomeric state.…”

“…These half-lives are consistent with the currently accepted values of 2.8047(4) days and 20.56(6) min, for 111 In and 112 In, respectively. The half-life for 112 In corresponds to an isomeric state. Lawson and Cork had previously assigned a ∼20 min half-life to 111 In in several papers [50][51][52].…”

“…Barnes also assigned an 18-20 min half-life to 111 In and he attributed a 2.7-day half-life to an 112 In isomer in 1939 [48]. Cork and Lawson assigned a 65.0(45) h half-life first to 113 In [51] and later to 112 In [52]. 113 …”

A new beta decaying isomer of131Sn; partial level scheme of131Sb

“…Andersson [5] has shown that the log(T1/2) value of the half life of alternate mass isotopes is often a linear function of the mass for isotopes with same spin and parity. By extrapolating the half-lives of the known isomers for the odd tin isotopes we can expect two isomers in 1318n with nearly the same half-life of 45 s as yet outlined by Izak and Amiel [4] (Fig. 1).…”

“…More recently, isomerism has also been evidenced in 129Sn by Fowler et al [-2] and Grapengiesser et al [-3] who have shown the existence of two beta decay modes of 134 s and 8.9 min half lives. For 131Sn, only one half life was observed up to now, of 63 _+ 3 s by Izak and Amiel [4], 65 __+ 6 s by Fowler et al [2] and 55+4 s by Grapengiesser et al [3]. Andersson [5] has shown that the log(T1/2) value of the half life of alternate mass isotopes is often a linear function of the mass for isotopes with same spin and parity.…”