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Observation of a new high-spin isomer in Pd-94
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2010 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 82, no 6, 061309- p.Article in journal (Refereed) Published
Abstract [en]

A second gamma-decaying high-spin isomeric state, with a half-life of 197(22) ns, has been identified in the N = Z + 2 nuclide Pd-94 as part of a stopped-beam Rare Isotope Spectroscopic INvestigation at GSI (RISING) experiment. Weisskopf estimates were used to establish a tentative spin/parity of 19(-), corresponding to the maximum possible spin of a negative parity state in the restricted (p(1/2), g(9/2)) model space of empirical shell model calculations. The reproduction of the E3 decay properties of the isomer required an extension of the model space to include the f (5/2) and p(3/2) orbitals using the CD-Bonn potential. This is the first time that such an extension has been required for a high-spin isomer in the vicinity of Sn-100 and reveals the importance of such orbits for understanding the decay properties of high-spin isomers in this region. However, despite the need for the extended model space for the E3 decay, the dominant configuration for the 19(-) state remains (p p(1/2)(-1)g(9/2)(-3))(11)circle times(nu g(9/2)(-2))(8). The half-life of the known, 14(+), isomer was remeasured and yielded a value of 499(13) ns.

Place, publisher, year, edition, pages
2010. Vol. 82, no 6, 061309- p.
National Category
Physical Sciences
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URN: urn:nbn:se:uu:diva-148998DOI: 10.1103/PhysRevC.82.061309ISI: 000286745100002OAI: oai:DiVA.org:uu-148998DiVA: diva2:403632
Available from: 2011-03-14 Created: 2011-03-14 Last updated: 2017-12-11Bibliographically approved

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