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Observation of isomeric decays in the r-process waiting-point nucleus Cd-130(82)
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0003-1771-2656
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2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 99, no 13Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2007. Vol. 99, no 13
Keyword [en]
shell structure, drip lines, astrophysics, model, isotopes, system, ni-78, gsi
URN: urn:nbn:se:kth:diva-16988DOI: 10.1103/PhysRevLett.99.132501ISI: 000249786700024ScopusID: 2-s2.0-34748855776OAI: diva2:335031
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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