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Identification of low-lying proton-based intruder states in Pb189-193
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2002 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 65, no 6Article in journal (Refereed) Published
Abstract [en]

Low-lying proton-based intruder states have been observed in the odd-mass isotopes Pb-189,Pb-191,Pb-193 in experiments at the RITU gas-filled recoil separator. The identification has been performed by observing the fine structure in the alpha decay of the parent Po-193,Po-195,Po-197 nuclei in prompt coincidence with conversion electrons and gamma rays in the daughter lead isotopes. Along with the literature data these results establish a systematics of intruder states in the odd-mass lead isotopes from Pb-197 down to Pb-185. Interpretation of these states involves the coupling of the 1i(13/2) or 3p(3/2) odd neutron to the 0(+) state in the oblate minimum in the even-mass lead core. Conversion coefficients have been determined for some of the transitions, revealing mixing between the coexisting states. The experimental results are compared to potential energy surface calculations.

Place, publisher, year, edition, pages
2002. Vol. 65, no 6
Keyword [en]
alpha-decay, shape coexistence, excited-states, fine-structure, mass nuclei, isotopes, transitions, pb-188, shell, pb
Identifiers
URN: urn:nbn:se:kth:diva-21704DOI: 10.1103/PhysRevC.65.064301ISI: 000176769200021OAI: oai:DiVA.org:kth-21704DiVA: diva2:340402
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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