Observation of Isomeric Decays in the R-Process Waiting-Point Nucleus Cd-130(82)
- Jungclaus, A
- Caceres, L
- Gorska, M
- Pfutzner, M
- Pietri, S
- Werner-Malento, E
- Grawe, H
- Langanke, K
- Martinez-Pinedo, G
- Nowacki, F
- Poves, A
- Cuenca-Garcia, J J
- Rudolph, D
- Podolyak, Z
- Regan, P H
- 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
- Wollersheim, H J
- Andgren, K
- Benlliure, J
- Benzoni, G
- Bruce, A M
- Casarejos, E
- Cederwall, B
- Crespi, F C
- Hadinia, B
- Hellstrom, M
- Hoischen, R
- Ilie, G
- Jolie, J
- Khaplanov, A
- Kmiecik, M
- Kumar, R
- Maj, A
- Mandal, S
- Montes, F
- Myalski, S
- Simpson, G S
- Steer, S J
- Tashenov, S
- Wieland, O
Publication date
July 2019
DOI Publisher
American Physical Society (APS) Journal
Physical Review LettersAbstract
The gamma decay of excited states in the waiting-point nucleus Cd-130(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a Xe-136 beam as well as in projectile fission of U-238, making Cd-130 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 Cd-98(50) to Cd-130(82) and reveal, in comparison with Ni-76(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.</p
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