Browsing by Author "Buck, B"

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    Evidence of nuclear clustering throughout a major shell
    (2005) Buck, B; Merchant, A C; Perez, S M
    We apply a cluster model to an extensive set of heavy even-even nuclei in the rare-earth region and determine the optimal core-cluster decomposition of each nucleus from a least-squares fit to the energy spectrum of its ground-state band. Good fits are obtained using a mass-symmetric form of the core-cluster interaction. We find that the core-cluster charge products deduced from the fits and the corresponding B(E2) values are strongly correlated, in support of an underlying cluster picture of these nuclei.
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    Theory of band comparison in even-even nuclei
    (American Physical Society, 2003) Buck, B; Merchant, A C; Perez, S M
    We previously found that a cluster model reproduces satisfactorily the properties of normal deformed (ND) ground state and superdeformed (SD) excited bands in a wide range of even-even nuclei. We show here that the fractional change of the transition energies in two bands described by similar core-cluster configurations is closely related to the fractional change in the corresponding reduced masses. We compare our predictions to data on ground state ND bands for a series of light rare-earth and actinide isotopes, and on SD bands in the A∼150 and 190 regions. The model strongly suggests the existence of similar excited SD bands in 212Pb and 212Po, in addition to the observed α-cluster-like ND ground state bands of these nuclei.