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New states in heavy Cd isotopes and evidence for weakening of the N = 82 shell structure |
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| Authors: | T. Kautzsch W.B. Walters M. Hannawald K.-L. Kratz V.I. Mishin V.N. Fedoseyev W. Böhmer Y. Jading P. Van Duppen B. Pfeiffer A. Wöhr P. Möller I. Klöckl V. Sebastian U. Köster M. Koizumi J. Lettry H.L. Ravn the ISOLDE Collaboration |
| Affiliation: | Institut für Kernchemie, Universit?t Mainz, D-55128 Mainz, Germany, DE Department of Chemistry, University of Maryland, College Park, MD 20742, USA, US Institute of Spectroscopy, Russian Academy of Sciences, RUS-142092 Troitzk, Russia, RU CERN, CH-1211 Geneva 23, Switzerland, CH Theoretical Division, LANL, Los Alamos, NM 87545, USA, US |
| Abstract: | A chemically selective laser ion source has been used in a β-decay study of heavy Ag isotopes into even-even Cd nuclides. Gamma-spectroscopic techniques in time-resolving event-by-event and multiscaling modes have permitted the identification of the first 2+ and 4+ levels in 126Cd78, 128Cd80, and tentatively the 2+ state in 130Cd82. From a comparison of these new states in 48Cd with the E(2+) and E(4+)/E(2+) level systematics of 46Pd and 52Te isotopes and several recent model predictions, possible evidence for a weakening of the spherical N = 82 neutron-shell below double-magic 132Sn is obtained. Received: 13 July 2000 / Accepted: 12 October 2000 |
| Keywords: | PACS. 27.60.+j 90≤ A≤ 149 – 23.20.Lv Gamma transitions and level energies |
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