类铜离子的电子碰撞参数及其规律
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摘要: 用准相对论扭曲波方法系统地计算了Ba、Nd、Gd、Yb、Au、Pb类铜离子组态能级之间的电子碰撞激发强度W (nl-n抣?/I>)，3≤n≤7，4≤n?/I>≤7，同时给出了高能极限的碰撞强度和外推到阈值的碰撞强度,用最小二乘样条方法拟合了全能域碰撞强度及热平均速率系数。对于一个激发过程, 用10个参数可以得到碰撞电子在任意能量下的碰撞强度以及任意温度下的速率系数,给出了类铜离子的各种标度规律。Abstract: Electron-impact excitation collision strength W (nl-n抣?/I>)，(3≤n≤7，4≤n?/FONT>≤7) among configuration average levels for the Cu-like Ions Ba,Nd,Gd,Yb,Au,Pb have been calculated systematically using the quasirelativistic distorted-wave methods. In addition, the collision strength in high energy limit have been calculated. The data for the collision strength or thermally averaged rate coefficient over the entire range of energy or temperature have been evaluated by a least-squares spline fitting procedure. As a result, the collision strength with arbitrary electron energy and rate coefficient with arbitrary temperature can be determined by ten parameters. Some scaled rules have also been given in the paper.
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Key words:
- excitation /
- collision strength /
- rate coefficient /
- cu-like ions.
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