氦原子与氮分子体系转动激发截面的理论计算

Theoretical calculation of rotational-excitation cross section for He-N_2

利用密耦近似方法对He－N_2碰撞体系的微分截面、分波截面进行了量子力学计算．研究表明:低能散射时,He-N_2碰撞的弹性散射主要在小角部分,而非弹性转动激发主要发生在大角部分．并通过系统的研究和计算,发现了分波散射截面在不同的能量下的变化规律．

The different scattering cross sections and the partial wave scattering cross sections for He-N2 have been calculated by employing the accepted exact Close-Coupling approximation method. It shows that elastic scattering takes place mainly at large scattering and inelastic rotational-excitation chief at small scattering angle at low-energy scattering for He-N2 system. The various rules of the partial wave cross sections in different energy conditions have been found by systemic investigation and calculation.