Core-coupled states and split proton-neutron quasiparticle multiplets in 122-126Ag

Lalkovski, S. and Bruce, A. M. and Jungclaus, A. and Górska, M. and Pfützner, M. and Cáceres, L. and Naqvi, F. and Pietri, S. and Podolyák, Zsolt and Simpson, G. S. and Andgren, K. and Bednarczyk, P. and Beck, T. and Benlliure, J. and Benzoni, G. and Casarejos, E. and Cederwall, B. and Crespi, F. C. L. and Cuenca-García, J. J. and Cullen, I. J. and Denis, Bacelar A. M. and Detistov, P. and Doornenbal, P. and Farrelly, G. F. and Garnsworthy, A. B. and Geissel, H. and Gelletly, W. and Gerl, J. and Grebosz, J. and Hadinia, B. and Kunné Sohler, Dorottya (2013) Core-coupled states and split proton-neutron quasiparticle multiplets in 122-126Ag. PHYSICAL REVIEW C, 87 (3). ISSN 2469-9985

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Abstract

Neutron-rich silver isotopes were populated in the fragmentation of a 136Xe beam and the relativistic fission of 238U. The fragments were mass analyzed with the GSI Fragment Separator and subsequently implanted into a passive stopper. Isomeric transitions were detected by 105 high-purity germanium detectors. Eight isomeric states were observed in 122-126Ag nuclei. The level schemes of 122,123,125Ag were revised and extended with isomeric transitions being observed for the first time. The excited states in the odd-mass silver isotopes are interpreted as core-coupled states. The isomeric states in the even-mass silver isotopes are discussed in the framework of the proton-neutron split multiplets. The results of shell-model calculations, performed for the most neutron-rich silver nuclei are compared to the experimental data. © 2013 American Physical Society.

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