Short note
Isospin effects on squeeze-out flow in heavy-ion collisions
Feng-Shou Zhang1,2,4 - Lie-Wen Chen1,2 - Wen-Fei Li1,2 - Zhi-Yuan Zhu1,3
1 Center of Theoretical Nuclear Physics,
National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China
2 Institute of Modern Physics, Academia Sinica, P.O. Box 31, Lanzhou
730000, China
3 Shanghai Institute of Nuclear Research, Academia Sinica, Shanghai 201800, China
4 CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China
fszhang@ns.lzb.ac.cn
Received: 14 March 2000 / Revised version: 21 September 2000
Communicated by W. Henning
Abstract
The squeeze-out flow in reactions of 124Sn + 124Sn and 124Ba
+ 124Ba at different incident energies for different impact parameters
is investigated by means of an isospin-dependent quantum molecular dynamics
model. For the first time, it is found that the more neutron-rich system (<tex2htmlcommentmark>
124Sn + 124Sn) exhibits weaker squeeze-out flow. This isospin
dependence of the squeeze-out flow is shown to mainly result from the
isospin dependence of nucleon-nucleon cross-section and the symmetry energy.
PACS
25.70.-z Low and intermediate energy heavy-ion collisions - 25.75.Ld Collective flow
Copyright Società Italiana di Fisica, Springer-Verlag 2000
