Excitation of nuclear anharmonic vibrations in heavy-ion fusion reactions

K. Hagino, S. Kuyucak, N. Takigawa

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37 Citations (Scopus)

Abstract

We discuss the effects of multiphonon excitations on heavy-ion fusion reactions at energies near and below the Coulomb barrier, focusing especially on the role of anharmonicities. We carry out a systematic study of those effects on the excitation function of the fusion cross section and on the fusion barrier distribution, by using the vibrational limit of the interacting boson model. We also analyze the recently measured high-precision data of the [Formula Presented] O + [Formula Presented] Sm fusion reaction with this model and discuss the anharmonic properties of the quadrupole as well as the octupole vibrations in [Formula Presented] Sm. Negative and positive static quadrupole moments are deduced for the first 2[Formula Presented] and 3[Formula Presented] states in [Formula Presented] Sm, respectively. It is shown that the fusion barrier distribution strongly depends on the sign of the quadrupole moments, suggesting that subbarrier fusion reactions offer an alternative method to extract the static quadrupole moments of phonon states in spherical nuclei.

Original languageEnglish
Pages (from-to)1349-1360
Number of pages12
JournalPhysical Review C - Nuclear Physics
Volume57
Issue number3
DOIs
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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