多电荷离子与C、Ne和Ar原子碰撞中K壳层电子俘获截面的计算

K-SHELL ELECTRON CAPTURE CROSS SECTINOS BY MULTICHARGED IONS FROMC,Ne AND Ar ATOMS

本文提出了一种计算多电荷离子与原子碰撞中K壳层电子俘获截面的新方法,称为模型势Oppenheimer-Brinkman-Krammer近似(MPOBK)。在该方法中我们用模型势来描述K电子所处的有效场,同时在波函数中考虑屏蔽效应。我们得到的K壳层总俘获截面是一个表解析达式。对H^+、He^(2+)-Ne,H^+、He^(2+)-C及O^(5+,6+)-Ar体系的计算表明本文结果较好地与实验数据一致。

A new method to calculate electron capture cross sections by multicharged ions from target K- shell is developed, which is called the model potential Oppenheimer-Brinkman-Kramers approximation(MPOBK) . In this method we consider the correlation effect between the active and the passive electrons and the screening effect in the wave function of the active electron.An analytical expression for total cross section by projectile from the K-shell is obtained.The present results for H+, He2+, Li8+-Ne, H+, H2+-C and C5+,6+ -Ar collisons agree well with the existing observed data.