Isospin effect on the yield of light particles and their correlations

The Lattice Cms Model is essentially introduced to describe the features of isospin effect on the yield of light particles,their ratios and double iso topic ratios. Calculations show that the multiplicity of light particles is consistent with the systematics of isospin. Moreover,the isotopic yield ra tios are in accordance with N/Z of the system. With the increasing of (N - Z)/A, the isotopic ratios decrease,but double isotopic ratios display their insensitivity to isospin.