Abstract The 140 MeV/u 40,48Ca+ 9Be and 58,64Ni+9Be reactions are simulated by the statistical abrasion ablation model, and the simulation results are compared to the National Superconducting Cyclotron Laboratory (NSCL) experimental data. By comparing the fragment isotopic distributions of 40,48Ca and 58,64Ni, we study the isospin effect in the projectile fragmentation induced by the neutron-rich nuclei at intermediate energy experimentally and theoretically. It is found that the isospin effect in projectile fragmentation decreases and even disappears as the violence of the collision increases.
Received: 07 December 2008
Revised: 03 June 2009
Accepted manuscript online:
Fund: Project partially supported by the
National Natural Science Foundation of China (Grant Nos 10775168 and
10775039), Shanghai Development Foundation for Science and
Technology (Grant No 06QA14062), and the State Key Program of Basic
Research of China (Grant No 2007CB815004).
Cite this article:
Ma Chun-Wang(马春旺) Wei Hui-Ling(魏慧玲), Wang Jun-Yang(王俊阳), and Liu Gao-Jie(刘高杰) Disappearance of isospin effect in projectile fragmentation at intermediate energy 2009 Chin. Phys. B 18 4781
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