Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprg11002f&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #G11.002
Physics
Scientific paper
High-spin states above the previously known 10^+ isomers of ^122Sn and ^124Sn were studied via prompt γ-ray spectroscopy. ^122Sn and ^124Sn were populated as fission fragments in the fission of the ^226Th compound nucleus formed in a fusion-fission reaction in a Gammasphere experiment at LBNL. ^122Sn was also populated and studied as evaporation residue in the ^124Sn(n,3n) reaction using the GEANIE array coupled to the spallation neutron source of the Los Alamos Neutron Science Center's WNR facility. The ^124Sn(n,n^') reaction in this experiment did not bring in enough angular momentum to adequately populate states above the 10^+ isomer in ^124Sn. Sequences of transitions were observed for the first time feeding the previously known 10^+ isomers, at 2766-, and 2657-keV excitation energy, and with 62μs and 45μs half-life, for ^122Sn and ^124Sn, respectively. The level schemes above the isomers were established up to 5386-, and 5952-keV excitation energy, for ^122Sn and ^124Sn, respectively. The experimental results are compared with predictions from shell-model calculations.
Cizewski Jolie A.
Clark R. M.
Devlin Mark
Fallon Paul
Fotiades N.
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