Observation of isomeric decays in the r-process waiting-point nucleus Cd-130(82)
2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 99, no 13Article in journal (Refereed) Published
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
shell structure, drip lines, astrophysics, model, isotopes, system, ni-78, gsi
IdentifiersURN: urn:nbn:se:kth:diva-16988DOI: 10.1103/PhysRevLett.99.132501ISI: 000249786700024ScopusID: 2-s2.0-34748855776OAI: oai:DiVA.org:kth-16988DiVA: diva2:335031
QC 201005252010-08-052010-08-05Bibliographically approved