Phys. Rev. Lett. 99, 132501 (2007) [5 pages]Observation of Isomeric Decays in the r-Process Waiting-Point Nucleus 130Cd82Received 29 June 2007; published 24 September 2007 The γ 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.132501
DOI:
10.1103/PhysRevLett.99.132501
PACS:
21.60.Cs, 23.20.Lv, 26.30.+k, 27.60.+j
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.