Observation of Isomeric Decays in the r-Process Waiting-Point Nucleus {sup 130}Cd{sub 82}
- Departamento de Fisica Teorica, Universidad Autonoma de Madrid, E-28049 Madrid (Spain)
- GSI; Germany
- Gesellschaft fuer Schwerionenforschung (GSI), D-64291 Darmstadt (Germany)
The {gamma} decay of excited states in the waiting-point nucleus {sup 130}Cd{sub 82} has been observed for the first time. An 8{sup +} two-quasiparticle isomer has been populated both in the fragmentation of a {sup 136}Xe beam as well as in projectile fission of {sup 238}U, making {sup 130}Cd the most neutron-rich N=82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N=82 shell quenching at Z=48. They allow us to follow nuclear isomerism throughout a full major neutron shell from {sup 98}Cd{sub 50} to {sup 130}Cd{sub 82} and reveal, in comparison with {sup 76}Ni{sub 48} one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.
- OSTI ID:
- 21024203
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.99.132501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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