A Rapid Radiochemical Procedure for Tin.

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

“…The first measured half-lives of several indium isotopes ( 104 In, 108 In, 111 In, 112 In, 114 In, and 121 In) were incorrect. The half-lives of 114 In and 116 In were first reported without a definite mass assignment.…”

“…111 Sn was identified by measuring decay curves with a Geiger counter in a magnetic field following chemical separation. ''The results showed that the activity was clearly obtained from the Cd 108 isotope but not from the Cd 106 112 Sn, 114 Sn and 115 Sn are listed in a table as the tin isotopes with the weakest intensity. 113 …”

“…The isotope 114 In was first identified in 1937 by Lawson and Cork as described in ''The radioactive isotopes of indium'' [50]. Indium was irradiated with 14-20 MeV neutrons produced from the bombardment of lithium with 6.3 MeV deuterons at the University of Michigan.…”

“…The 50-day half-life agrees with the currently accepted value for the 49.51(1) day isomeric state. The half-life of the 114 In ground state is 71.9(1) s. Half-lives of 1 min [55] and 1.1 min [14] had been measured previously but no mass assignments were made. Also, a 13 s half-life had been assigned incorrectly to 114 In [56].…”

“…In 1963 Greendale and Love reported the first observation of 131 Sn and 132 Sn in ''A rapid radiochemical procedure for tin'' [114].…”