Some New Isotopes of Antimony and Tin

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

“…The indium isotope, which is produced by the decay of the tin isotope and by bombarding cadmium 108 with deuterons, decays with a half-life of about 55 min by emitting positrons of 2 MeV energy and gamma rays''. These half-lives agree with the presently accepted values of 32.4(3) min and 58.0(12) min for 107 In and 108 In, respectively. A 5 h half-life had previously incorrectly been assigned to 108 In [47].…”

“…''In addition to the γ lines of the known isotopes we observe in the spectra γ rays... with a half-life T 1/2 = 1.9 ± 0.3 min, which we ascribe, on the basis of the identification described below, to the decay of a new isotope, 106 Sn''. This half-life agrees with the currently adopted value of 115(5) s. 107 …”

“…A previously measured half-life of 1.3(3) min [79] could not be confirmed. Also the energies of two γ -rays assigned to 107 Sn [80] could not be reproduced. 108 …”

“…10 MeV deuterons and 5 MeV protons from the Mendenhall Laboratory at Ohio State University bombarded enriched 106 Cd and 108 Cd targets to produce 107 In and 108 In, respectively. Decay curves measured with a spectrometer counter and a Wulf unifilar electrometer were recorded following chemical separation.…”

“…107 Sn was produced by bombarding enriched 105 CdO with 30 MeV 3 He from the Washington University cyclotron. '' 107 Sn and 107 In m , produced in 3 He bombardments of 106 Cd and transported with a He-jet system, have been identified with Ge(Li) γ -ray detectors. Half-lives of these nuclides were determined to be 2.90 ± 0.05 min and 50.4 ± 0.6 s, respectively''.…”