氦同位素被氟化氢散射角分布的计算

Calculation of angular distribution for scatterings of He isotope with HF

用密耦方法计算了碰撞能量分别为20和86meV时,3 He,4 He,6 He和9 He被HF分子散射的角分布,总结了氦同位素原子对He-HF散射角分布的影响.计算结果表明:在同一入射能量下,随着入射氦同位素原子质量的增加,总微分截面在0°时的角分布逐渐增大;同一级衍射振荡极小值位置逐渐向小散射角方向移动;He同位素原子与HF分子碰撞发生的彩虹现象越明显.

The angular distribution for scatterings of 3He（4He,6He,9He） atoms with HF molecules was calculated by means of the close-coupling method.The calculations were performed separately at the collision energies of 20 and 86 meV,and the influence of He isotope atoms on the angular distribution for the He-HF scatterings was given.The results indicate that,at identical collision energy and as the incident He isotope atom mass increases,the angular distribution of the total differential cross sections（DCSs） at zero degree increases,the position of oscillation minimum of the same order gradually shifts towards the small scattering angle,and the rainbow phenomenon of He isotope atoms colliding with HF molecules becomes more evident.