Enhanced fusion-evaporation cross sections in neutron-rich 132Sn on 64Ni.
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.
Liang
J F
JF
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Shapira
D
D
Gross
C J
CJ
Beene
J R
JR
Bierman
J D
JD
Galindo-Uribarri
A
A
Gomez del Campo
J
J
Hausladen
P A
PA
Larochelle
Y
Y
Loveland
W
W
Mueller
P E
PE
Peterson
D
D
Radford
D C
DC
Stracener
D W
DW
Varner
R L
RL