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中文摘要：
用Tang-Toennies势模型和密耦近似方法计算了不同能量下惰性气体原子He与H2及其同位素D2，T2替代碰撞体系的振转激发碰撞截面，通过分析He-H2（D2，T2）各碰撞体系分波截面的差异，总结出在H2分子的对称同位素替代情形下He-H2（D2，T2）碰撞体系分波截面随量子数和体系约化质量变化的规律。结果表明，体系的约化质量及入射原子相对碰撞能量的变化均给体系的碰撞截面带来不同程度的影响。
英文摘要：
Tang-Toennies potential model and close-coupling method were applied to the He-H2 （D2, T2 ） system, and the vibrational and rotational excitation cross sections at different incidence energy have been calculated. By analyzing the differences of these partial wave cross sections, the change rules of the partial wave cross sections with increase of quantum number, and with change of reduced mass of symmetric isotopic substituted system have been obtained. Based on the calculation, influence on the cross sections exerted by the variations in the reduced mass of systems and in the relative incoming energy of incident atom is discussed.
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