利用同位旋相关的量子分子动力学研究和寻找提取中能重离子碰撞多重碎裂中同位旋相关核子 -核子碰撞截面的可能观测量 .计算结果表明 ,在多重碎裂过程中中等质量碎片多重性与带电粒子总数之间的关联是在所选能区提取介质中同位旋相关核子 -核子碰撞截面的灵敏观察量 .应用重质量弹核打轻质量靶核具有反应产物向前角发射这一逆反应效应 ,可以在有限探测器条件下与实验相结合提取介质中同位旋相关的核子 -核子碰撞截面 Isotope-related Quantum Molecular Dynamics (QMD) was used to study and find possible observations of isospin-related nucleon-nucleon collision cross sections in multiple fragmentation with mid-energy heavy ion collisions. The calculated results show that the multiplicity of medium- The correlation with the total number of charged particles is the sensitive observation of the isospin-related nucleon-nucleon collision cross-section in the extracted energy region. The application of heavy mass bombardment to a light-quality target nucleus has the inverse reaction of the reaction product firing toward the anterior horn Effect, the detector can be combined with the experimental conditions under the conditions of the medium isotropically related to nuclear-nuclear collision cross-section