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gamma-ray spectroscopy of Bi-191,Bi-193
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2004 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 69, no 6, 064326- p.Article in journal (Refereed) Published
Abstract [en]

Prompt and delayed gamma rays from Bi-191,Bi-193 have been identified using the recoil-decay tagging, isomer tagging, and recoil gating techniques, resulting in extensive level schemes for both nuclei. Excitation energies of the isomeric 13/2(+) states have been established and oblate strongly coupled bands built on them have been observed. The nearly spherical 9/2(-) ground-state bands appear to be crossed by more oblate-deformed low-lying structures. The properties of the bands feeding the 1/2(+) intruder states indicate some structural change between Bi-193 and Bi-191. The deformation associated with each of these states has been extracted from total Routhian surface calculations which also reveal the development of prolate minima with decreasing neutron number. B(M1)/B(E2) ratios have been measured for the observed strongly coupled bands in order to resolve the intrinsic excitations. The observed quasiparticle structures in Bi-193 and high-spin isomers both in Bi-193 and Bi-191 are interpreted based on the coupling of the odd proton to the even-even Pb core.

Place, publisher, year, edition, pages
2004. Vol. 69, no 6, 064326- p.
Keyword [en]
high-spin states, model intruder states, alpha-decay, shape coexistence, odd-mass, in-beam, bismuth isotopes, 1st observation, excited-states, proton-decay
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-23549DOI: 10.1103/PhysRevC.69.064326ISI: 000222391000034Scopus ID: 2-s2.0-4043145052OAI: oai:DiVA.org:kth-23549DiVA: diva2:342247
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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