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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 |
| Institution: | 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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