Subbarrier heavy ion fusion enhanced by nucleon transfer
1 Institute for Nuclear Research, Prospect Nauki 47, 252028 Kiev, Ukraine
2 GSI-Darmstadt, Planckstrasse 1, 64291 Darmstadt, Germany (e-mail: denisov@clri6a.gsi.de)
Received: 23 August 1999 / Revised version: 30 September 1999 Communicated by P. Schuck
Abstract
We discuss a model for the description of subbarrier fusion of
heavy ions which takes into account the coupling to the low-energy
surface vibrational states and to the few-nucleon transfer with
arbitrary reaction Q-value. The fusion reactions
28,30Si+
58,62,64Ni, 40Ca+90,96Zr,
28S+94,100Mo, 58Ni+64Ni,
16,18,20,22,24O+58Ni and
28Si+
124,126,128,130,132Sn are analyzed in detail. The
model describes rather well the experimental fusion cross section
and mean angular momentum for reactions between nuclei near the
-stability line. It is shown that these quantities are
significantly enhanced by few-nucleon transfer with large positive
Q-value. A shape independent parameterization of the heavy ion
potential at distances smaller then the touching point is
proposed.
PACS
25.60.Je Transfer reactions -
25.60.Pj Fusion reactions -
25.70.Hi Transfer reactions -
25.70.Jj Fusion and fusion-fission reactions
Copyright Società Italiana di Fisica, Springer-Verlag 2000
