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Discovery of a new long-lived isomeric state in 125Ce |
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| Authors: | B. Sun Yu. A. Litvinov P. M. Walker K. Beckert P. Beller F. Bosch D. Boutin C. Brandau L. Chen C. Dimopoulou H. Geissel R. Knöbel C. Kozhuharov J. Kurcewicz S. A. Litvinov M. Mazzocco J. Meng C. Nociforo F. Nolden W. R. Plass C. Scheidenberger M. Steck H. Weick M. Winkler |
| Affiliation: | 1. School of Physics and MOE Key Laboratory of Heavy Ion Physics, Peking University, 100871, Beijing, China 2. Gesellschaft für Schwerionenforschung GSI, 64291, Darmstadt, Germany 3. Justus-Liebig Universit?t, 35392, Giessen, Germany 4. Department of Physics, University of Surrey, GU2 7XH, Guildford, UK 5. Warsaw University, Hoza 69, 00-681, Warszawa, Poland |
| Abstract: | A new long-lived isomeric state in the near proton dripline nucleus 125Ce has been identified with Schottky mass spectrometry at GSI. The excitation energy E * = 103(12)keV and the decay time of 193(1)s have been obtained from a single stored fully ionized 125m Ce58+ ion. The data implies an E3 transition and a 1/2+ assignment for the spin of the isomer. |
| Keywords: | 21.10.Dr Binding energies and masses 21.10.Tg Lifetimes 23.20.Lv γ transitions and level energies |
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