Fine structure in the alpha decay of Po-188,Po-192
2003 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 68, no 5Article in journal (Refereed) Published
The alpha decay of Po-188,Po-192 has been reexamined in order to probe the 0(+) states in the daughter nuclei Pb-184,Pb-188 that can be associated with coexisting spherical, oblate, and/or prolate configurations. Improved values were measured for the excitation energy and the feeding alpha -decay intensity of the 0(2)(+) state in Pb-184,Pb-188 and conflicting results on the 0(3)(+) state in Pb-188 were clarified. All known cases of fine structure in the alpha decay of the even-even Po nuclei are reviewed. The reduced alpha-decay width systematics combined with potential-energy-surface calculations confirm the onset of deformation in the ground state of the polonium nuclei around the neutron midshell. An isomeric state with a half-life of 580(100)ns has been identified in Po-192 .
Place, publisher, year, edition, pages
2003. Vol. 68, no 5
gamma-ray spectroscopy, even-even nuclei, shape coexistence, intruder states, mass nuclei, po isotopes, pb-186, po-192, shell
IdentifiersURN: urn:nbn:se:kth:diva-23049DOI: 10.1103/PhysRevC.68.054311ISI: 000187578300021OAI: oai:DiVA.org:kth-23049DiVA: diva2:341747
QC 201005252010-08-102010-08-102010-09-06Bibliographically approved