Probing the sustainability of the N=82 and Z=50 shell closures for neutron-rich nuclides: Decay of120Rh75 to levels of 120Pd74

W. B. Walters, B. E. Tomlin, P. F. Mantica, B. A. Brown, J. Rikovska Stone, A. D. Davies, A. Estrade, P. T. Hosmer, N. Hoteling, S. N. Liddick, T. J. Mertzimekis, F. Montes, A. C. Morton, W. F. Mueller, M. Ouellette, E. Pellegrini, P. Santi, D. Seweryniak, H. Schatz, J. ShergurA. Stolz

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Abstract

The low-energy levels of 120Pd74 were populated by β decay of 120Rh75, which was produced via projectile fragmentation of a 136Xe82 beam at 120 MeV/nucleon. Delayed β-gated γ rays with energies of 438 and 618 keV were observed in coincidence with 120Rh75 fragments and assigned to the 21+ → 0+ and 41+ → 21+ transitions, respectively, in 120Pd74. Isomeric γ-ray transitions are also reported for 120Rh75 and 126Cd78. The low-energy structure of 120Pd74 shows remarkable similarity to those of the isotopic 108Pd62 and isotonic 128Xe74 suggesting that these nuclides share the same Z=50 and N=82 closed shell structures with neutron-rich 120Pd 74.

Original languageEnglish
Article number034314
Pages (from-to)343141-343145
Number of pages5
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number3
DOIs
StatePublished - Sep 2004

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