Isospin effect of projectile fragment yields

Isospin asymmetry is very important in the nuclear equation of state (EOS), isotope yield from the projectile fragments can give information of the reaction process. In this paper projectile fragment yields are measured in the collision Ar-36,Ar-40 + Ni-64 at incident energy 50 MeV/u with different isospin asymmetry project Ar-36,Ar-40, data analysis, particle identification and event selection are described. Isotope yields are compared in these two reactions, and axe also compared with the empirical parametrization of fragmentation cross-section calculated by EPAX.National Natural Science Foundation of China 10405033 10505026 Knowledge Innovation Project of Chinese Academy of Sciences KJXC3-SYW-N2 Major State Basic Research Development Program in China 2007CB815004 National Defense Scientific Innovation Foundation of Chinese Academy of Sciences CXJJ-21