Observation of isomeric decays in the $r$-Process waiting-point nucleus $^{130}Cd_{82}$
- Jungclaus, A.
- Caceres, L.
- Gorska, M.
- Pfützner, M.
- Piétri, S.
- Werner-Malento, E.
- Grawe, H.
- Langanke, K.
- Martínez-Pinedo, G.
- Nowacki, F.
- Poves, A.
- Cuenca-García, J.J.
- Rudolph, D.
- Podolyak, Z.
- H. Regan, P.
- Detistov, P.
- Lalkovski, S.
- Modamio, V.
- Walker, J.
- Bednarczyk, P.
- Doornenbal, P.
- Geissel, H.
- Gerl, J.
- Grebosz, J.
- Kojouharov, I.
- Kurz, N.
- Prokopowicz, W.
- Schaffner, H.
- J. Wollersheim, H.
- Andgren, K.
- Benlliure, J.
- Benzoni, G.
- M. Bruce, A.
- Casarejos, E.
- Cederwall, B.
- C. L. Crespi, F.
- Hadinia, B.
- Hellström, M.
- Hoischen, R.
- Ilie, G.
- Jolie, J.
- Khaplanov, A.
- Kmiecik, M.
- Kumar, R.
- Maj, A.
- Mandal, S.
- Montes, F.
- Myalski, S.
- Simpson, G.S.
- J. Steer, S.
- Tashenov, S.
- Wieland, O.
Publication date
January 2007
DOI Publisher
American Physical Society (APS)Abstract
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
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