Sub-barrier fusion enhancement in neutron-rich radioactive 132Sn on 64Ni

J. F. Liang, D. Shapira, C. J. Gross, J. R. Beene, J. D. Bierman, A. Galindo-Uribarri, J. Gomez Del Campo, P. A. Hausladen, Y. Larochelle, W. Loveland, P. E. Mueller, D. Peterson, D. C. Radford, D. W. Stracener, R. L. Varner

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4 Scopus citations


Evaporation residue cross sections have been measured using neutron-rich radioactive 132Sn beams incident on a 64Ni target in the vicinity of the Coulomb barrier. This is the first experiment using accelerated 132Sn beams to study nuclear reaction mechanisms. The average beam intensity was 2 x 104 particles per second and the smallest cross section measured was less than 5 mb. A large sub-barrier fusion enhancement was observed compared to evaporation residue cross sections for 64Ni on stable even Sn isotopes. The enhancement cannot be accounted for by a simple barrier shift due to the change in nuclear sizes. Coupled-channel calculations including inelastic excitation underpredict the measured cross sections below the barrier. The presence of several neutron transfer channels with large positive Q values suggests that multinucleon transfer may play an important role in enhancing the fusion of 132Sn and 64Ni.

Original languageEnglish
Pages (from-to)106-112
Number of pages7
JournalProgress of Theoretical Physics Supplement
StatePublished - 1 Jan 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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