电子与Ar的高电荷态离子的碰撞电离

Electron-impact Ionization Cross Sections and Rates for Highly Charged Argon Ions

利用扭曲波Born交换近似方法 ,系统地计算了Ar的类氢到类钠离子的电子碰撞电离截面和速率系数 .同时使用精度高的拟合公式对直接电离截面、激发截面、总激发自电离截面和速率系数进行了拟合 。

A distorted-wave Born exchange (DWBE) approximation includ in g relativistic correction is used to calculate the electron-impact ionization cross sections and rate coefficients for the highly charged argon ions: Ar 7+ , Ar 8+ , ... , Ar 17+ . The comparison of the calculated results wit h the experimental data and other theoretical calculations shows that the DWBE method is valid for these ions. The calculated results for direct ionization cro ss sections and excitation autoionization are fitted by empirical formulas to me et the requirements of applications. A set of improved empirical formulas are ab tained for the fast and accurate calculations of rate coefficients from the fit parameters of cross sections.