He-N_2势能表面对散射截面的影响

从总散射截面、微分散射截面和分波散射截面三方面对He-N2体系的三个势能表面进行了详细比较。计算中采用了精确度较高的密耦(Close-Coupling)近似方法(E=64meV),计算结果与MKeil等的实验结果基本相符。研究结果表明:势能球平均零点能位置、势阱深度、排斥势的强度以及势能在势阱附近的方向性都对散射截面有较大的影响,为根据散射截面准确地确定He-N2体系的相互作用势能参数提供了一种新依据。

The effect of the potential energy surfaces of the scattering cross section for He-N_2

A detailed comparison of three potential energy for He-N 2 system has been carried out. The comparison is made with the total scattering cross sections, the differential scattering cross sections and the partial wave scattering cross sections. The exact close-coupling approximation method is employed in the scattering calculation at collision energy of 64meV. The results of the calculation are corresponding to the data of the scattering experiment by M.Keil et al . It is established that the cross sections are sensitive to the position where potential is zero, the well depth, the strength of the repulsive wall of the spherically averaged and to the anisotropy of the region of the well depth. A new founcation is offered for determining exactly the parametcrs of interaction potential of He-N 2 system from the scatting cross sections.