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alpha-decay of the new isotope Po-187: Probing prolate structures beyond the neutron mid-shell at N=104
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2006 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 73, no 4, 044324- p.Article in journal (Refereed) Published
Abstract [en]

The new neutron-deficient isotope Po-187 has been identified in the complete fusion reaction Ti-46+Sm-144 -> Po-187+3n at the velocity filter SHIP. Striking features of the Po-187 alpha decay are the strongly-hindered decay to the spherical ground state and unhindered decay to a surprisingly low-lying deformed excited state at 286 keV in the daughter nucleus Pb-183. Based on the potential energy surface calculations, the Po-187 ground state and the 286 keV excited state in Pb-183 were interpreted as being of prolate origin. The systematic deviation of the alpha-decay properties in the lightest odd-A Po isotopes relative to the smooth behavior in the even-A neighbors is discussed. Improved data for the decay of Bi-187(m,g) were also obtained.

Place, publisher, year, edition, pages
2006. Vol. 73, no 4, 044324- p.
Keyword [en]
odd bi isotopes, intruder states, po isotopes, shape coexistence, spectroscopy, nuclei, deformation, pb, polonium, energies
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-15646DOI: 10.1103/PhysRevC.73.044324ISI: 000237157300036ScopusID: 2-s2.0-33646256177OAI: diva2:333688
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2010-08-20Bibliographically approved

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Wyss, Ramon
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