Levels and transitions in Pb204 and the four valence neutron-hole configurations

J. M. Hanly, S. E. Hicks, M. T. McEllistrem, S. W. Yates

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7 Scopus citations


Levels of the nucleus Pb204 have been investigated using the (n,n) reaction, and rays from low-spin excited levels have been observed. Forty-three low-spin levels connected by 78 rays are found below 2.9 MeV, whereas only about 28 levels had previously been known. The levels below 2 MeV excitation energy are expected to be dominated by the p1/2, f5/2, and p3/2 valence neutron hole excitations, and 0+ levels at 0, 1730, and 2433.1 keV are associated primarily with these configurations. These states are at almost the same excitation energies as parent 0+ excitations in Pb206. Approximately six unnatural-parity levels are identified; this is close to the number predicted in six orbit valence-space shell model calculations. The number of natural-parity levels found, however, is almost twice that calculated with the shell model. Levels and transitions below 2 MeV excitation energy are consistent with expectations basing Pb204 states on correlated two-hole excitations dominant in Pb206.

Original languageEnglish
Pages (from-to)1840-1854
Number of pages15
JournalPhysical Review C - Nuclear Physics
Issue number5
StatePublished - 1988

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Copyright 2015 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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