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 and Wieland, O (2007) Observation of Isomeric Decays in the R-Process Waiting-Point Nucleus Cd-130(82) Physical Review Letters, 99 (13). ISSN 0031-9007

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Abstract

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.

Item Type:	Article
Additional Information:	Published in <i>Physical Review Letters,</i> Vol. 99, Iss. 13. Copyright 2007 American Physical Society. Click <a href=http://prl.aps.org/>here</a> to access the journal's website.
Divisions:	Faculty of Engineering and Physical Sciences > Physics
Depositing User:	Mr Adam Field
Date Deposited:	27 May 2010 14:05
Last Modified:	23 Sep 2013 18:25
URI:	http://epubs.surrey.ac.uk/id/eprint/45

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