Enhanced fusion-evaporation cross sections in neutron-rich 132Sn on 64Ni.
/ Authors
J. Liang, D. Shapira, C. J. Gross, J. Beene, J. D. Bierman, A. Galindo-Uribarri, J. Campo, P. Hausladen, Y. Larochelle, W. Loveland
and 5 more authors
P. Mueller, D. Peterson, D. Radford, D. Stracener, R. Varner
/ Abstract
Evaporation residue cross sections have been measured with neutron-rich radioactive 132Sn beams on 64Ni in the vicinity of the Coulomb barrier. The average beam intensity was 2 x 10(4) particles per second and the smallest cross section measured was less than 5 mb. Large sub-barrier fusion enhancement was observed. Coupled-channel calculations taking into account inelastic excitation significantly 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.
Journal: Physical review letters