He同位素原子与HCl分子碰撞的微分截面的理论研究

Theoretical study of the differential cross sections for collisions between He isotope atoms and HCl molecules

本文基于Huxley势函数的拟合势,利用密耦近似方法计算了入射能量E为95meV时,3He,4He,9He,10He分别与HCl分子碰撞的微分散射截面,探讨了同位素替代效应对散射角分布的影响.研究表明:同一碰撞能量下,随着氦同位素原子质量的增加,总微分截面在散射角θ=0°时的角分布依次增大,衍射振荡平均间隔逐渐减小,同一级衍射振荡极小值位置逐渐向小的θ方向移动;总非弹性截面与弹性截面的交界角逐渐减小.

It is based on the fit potential of Huxley analytic function in this research that the differential cross sections（DCSs） for collisions between He（3He,4He,9He,10He）atoms and HCl molecules are calculated by using the close coupling approximation when the incident energy is 95meV.The influences of He isotope atoms on angular distribution is discussed.The results show that at the identical energy,the angular distribution of the total differential cross section（DCS） at zero degree increases and the position of oscillation minimum of the same order gradually shift towards small scattering angle along with the increase of the incident isotope He atom mass.And the interval of two minimum positions of oscillation decreases.And crossing angle between the elastic and total inelastic DCS gradually decreases.