慢电子与H_2O分子弹性碰撞截面的计算

CALCULATION FOR TOTAL CROSS-SECTIONS AND MOMENTUM-TRANSFER CROSS-SECTIONS OF THE ELASTIC SCATTERING OF SLOW ELECTRONS BY H_2O

我们用H_2O分子的单中心类氖波函数推导了投射电子与H_2O分子之间相互作用势的解析表达式,其中包含了投射电子与H_2O分子间的静电库仑相互作用、极化作用及交换作用。我们应用上述解析表达式计算了投射电子在H_2O分子场中运动的畸变波函数、分波相移(l≤5)分波截面、总截面,动量转移截面及微分散射截面。

The theory of the elastic scattering of slow electrons by a molecule in high temperture gas can be derived very simply by considering the molecule as in rotation with spherically symmetric mean field. According to this model, a simple one-center spherically symmetric wave function for H2O molecule in rotation is used to calculate total cross-sections and momentum -transfer cross-sections of the elastic scattering of slow electrons by it. By using the above model, we have derived the analytic potential function for the incident electron with the H2O molecule,including coulomb's interaction, the polarization and exchange effects. With the parial wave method, we have further calculatedd the istorted wave functions, phase shifts(l<5), scattering cross-sections for the slow electroos-moving in the molecular field represented by the derived potential function.