电子在中性原子势场中的自由-自由跃迁吸收截面的理论计算

THEORY CALCULATION FOR THE FREE-FREE RADIATIVE TRANSITION OF THE FREE ELECTRON IN THE POTENTIAL FIELD OF NEUTRAL ATOM

本文采用等效势模型,并基于Hartree——Fock解析波函数和X_α数值波函数计算自由电子与中性Ar和Si原子的相互作用势。用直接计算矩阵元方法和通过计算碰撞相移方法计算了电子在中性Ar原子势场中的自由—自由跃迁吸收截面,所得结果与Ashkin理论计算值符合较好,对中性Si原子亦进行了计算。通过计算说明了等效势模型对计算中性原子的自由—自由跃迁吸收截面是成功的。

The model of effective potential, Hartree-Fock analytic wavefunction and Xa numerical wavefunction are adopted to calculate the potential for the interaction of free electron and neutral Ar and Si Atom. The free-free radiative transition cross sections of free electron in the potential field of neutral atoms Ar and Si are obtained through the scattering phase shifts and calculation the direct matrix elements. The calculation cross sections of free-free radiative transition of neutral atom Ar is in good agreement with that calculation by Ashkin theory results. It shows that the calcutalion of free-free radiative transition cross sections of neutral atoms using the model potential are successful.