arXivDaily arXiv每日学术速递 周一至周五更新
arXiv physics/0001008physics.atom-ph
收藏

高电荷态离子与单光电子原子电荷交换的半经典过势垒模型

A semi-classical over-barrier model for charge exchange between highly charged ions and one-optical electron atoms

F. Sattin

摘要:

最近测量了慢高电荷态离子与碱金属靶之间电子俘获的绝对总截面。发现这些截面与弹丸电荷遵循标度律,这与先前基于经典过势垒模型(OBM)提出并以稀有气体和分子为靶验证的标度律不同。在本文中,我们开发了一个“半经典”(即包括一些量子功能)OBM试图恢复实验结果。然后将该方法应用于离子-氢碰撞,并与复杂的量子力学计算结果进行比较。在前一种情况下,一致性很好,而在后一种情况下,没有找到如此令人满意的结果。

英文摘要:

Absolute total cross sections for electron capture between slow, highly charged ions and alkali targets have been recently measured. It is found that these cross sections follow a scaling law with the projectile charge which is different from the one previously proposed basing on a classical over-barrier model (OBM) and verified using rare gases and molecules as targets. In this paper we develop a "semi-classical" (i.e. including some quantal features) OBM attempting to recover experimental results. The method is then applied to ion-hydrogen collisions and compared with the result of a sophisticated quantum-mechanical calculation. In the former case the accordance is very good, while in the latter one no so satisfactory results are found. A qualitative explanation for the discrepancies is attempted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑