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: email@example.com)
Received: 23 August 1999 / Revised version: 30 September 1999 Communicated by P. Schuck
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.
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