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Isomeric states observed in heavy neutron-rich nuclei populated in the fragmentation of a (208)Pb beam

AuthorsSteer, S. J.; Jungclaus, Andrea ; Estévez Aguado, María Esther ; Wieland, O.
Issue Date14-Oct-2011
PublisherAmerican Physical Society
CitationPhysical Review C - Nuclear Physics 84: 044313 (2011)
AbstractHeavy neutron-rich nuclei were populated via the fragmentation of a E/A = 1 GeV (208)(82)Pb beam. Secondary fragments were separated and identified and subsequently implanted in a passive stopper. By the detection of delayed gamma rays, isomeric decays associated with these nuclei have been identified. A total of 49 isomers were detected, with the majority of them observed for the first time. The newly discovered isomers are in (204,205)(80)Hg, (201,202,204,205)(79)Au, (197,203,204)(78)Pt, (195,199-203)(77)Ir, (193,197-199)(76)Os, (196)(75)Re, (190,191)(74)W, and (189)(73)Ta. Possible level schemes are constructed and the structure of the nuclei discussed. To aid the interpretation, shell-model as well as BCS calculations were performed. ©2011 American Physical Society
Identifiersissn: 0556-2813
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