Observation of isomeric decays in the r-process waiting-point nucleus Cd82130

  • A. Jungclaus
  • , L. Cáceres
  • , M. Górska
  • , M. Pfützner
  • , S. Pietri
  • , E. Werner-Malento
  • , H. Grawe
  • , K. Langanke
  • , G. Martínez-Pinedo
  • , F. Nowacki
  • , A. Poves
  • , J. J. Cuenca-García
  • , D. Rudolph
  • , Z. Podolyak
  • , P. H. Regan
  • , P. Detistov
  • , S. Lalkovski
  • , V. Modamio
  • , J. Walker
  • , P. Bednarczyk
  • P. Doornenbal, H. Geissel, J. Gerl, J. Grebosz, I. Kojouharov, N. Kurz, W. Prokopowicz, H. Schaffner, H. J. Wollersheim, K. Andgren, J. Benlliure, G. Benzoni, A. M. Bruce, E. Casarejos, B. Cederwall, F. C.L. Crespi, B. Hadinia, M. Hellström, R. Hoischen, G. Ilie, J. Jolie, A. Khaplanov, M. Kmiecik, R. Kumar, A. Maj, S. Mandal, F. Montes, S. Myalski, G. S. Simpson, S. J. Steer, S. Tashenov, O. Wieland

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Abstract

The γ decay of excited states in the waiting-point nucleus Cd82130 has been observed for the first time. An 8+ two-quasiparticle isomer has been populated both in the fragmentation of a Xe136 beam as well as in projectile fission of U238, making Cd130 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 Cd5098 to Cd82130 and reveal, in comparison with Ni4876 one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.

Original languageEnglish
Article number132501
JournalPhysical Review Letters
Volume99
Issue number13
DOIs
StatePublished - Sep 24 2007
Externally publishedYes

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