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首页> 外文期刊>Physical Review, A >Application of a grid numerical method to calculate state-selective cross sections for electron capture in Be4+ + H(1s) collisions
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Application of a grid numerical method to calculate state-selective cross sections for electron capture in Be4+ + H(1s) collisions

机译：网格数值方法在计算Be4 + + H（1s）碰撞中电子俘获的状态选择截面中的应用

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摘要

Charge-transfer n partial cross sections have been calculated for collisions of Be4+ with H(1s) by means of a versatile lattice method that is applicable in a wide energy range (between 1 and 500 keV/u). The cross sections, which include up to the high-lying n = 8 level, are compared to existing semiclassical calculations in order to quantify the accuracy of the results. The reliability of the lattice method at high impact energies is confirmed by comparison with classical trajectory Monte Carlo calculations. It is found that the n partial cross sections larger than 10(-18) cm(2), calculated using the lattice method, agree with differences smaller than 15% with those from the method considered the most accurate at each energy. The calculation yields as well accurate total electron capture cross sections, which are studied in detail at E = 100 keV/u to obtain a converged value.
机译：已经通过通用晶格方法计算了Be4 +与H（1s）碰撞的n个电荷转移截面，该方法适用于较宽的能量范围（1到500 keV / u之间）。将包括最高n = 8级的横截面与现有的半经典计算进行比较，以量化结果的准确性。通过与经典轨迹蒙特卡洛计算的比较，证实了高冲击能量下晶格方法的可靠性。发现使用晶格方法计算出的大于10（-18）cm（2）的n个局部横截面与小于15％的差异相一致，与认为是在每种能量下最精确的方法的差异小于15％。计算得出的结果以及精确的总电子俘获截面，将在E = 100 keV / u时进行详细研究，以获得收敛值。

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