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Observation of Isomeric Decays in the r-Process Waiting-Point Nucleus 130Cd

Publiceringsår: 2007
Språk: Engelska
Publikation/Tidskrift/Serie: Physical Review Letters
Volym: 99
Nummer: 13
Dokumenttyp: Artikel i tidskrift
Förlag: American Physical Society


The gamma decay of excited states in the waiting-point nucleus 130Cd82 has been observed for the first time. An 8+ two-quasiparticle isomer has been populated both in the fragmentation of a 136Xe beam as well as in projectile fission of 238U, making 130Cd 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 98Cd50 to 130Cd82 and reveal, in comparison with 76Ni48 one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.


  • Subatomic Physics


  • Nuclear Structure-lup-obsolete
  • ISSN: 1079-7114

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