论文标题
关于重离子诱导的M壳电离的多个电离和电子捕获过程的理论研究
Theoretical studies on multiple ionisation and electron capture processes in heavy ion induced M-shell ionisation
论文作者
论文摘要
发现多种电离和电子捕获是K和L X射线排放的重要机制，以及重离子原子碰撞中的直接库仑电离。自然，这两种机制对于M X射线排放也可能很重要。但是，这些与M壳相关的机制非常复杂，尚未令人信服地研究。在这项工作中，我们已经讨论了以更通用的方式研究这些机制的理论技术，从而在很大程度上解决了有关M壳的理论和实验之间的巨大差距。我们已经用一些代表性的案件证明了这项技术合理的理由。例如，硅和硫弹弹离子与5到10 MeV的束能的金色和二晶靶相撞。在这里，我们看到捕获的贡献要比来自多重电离效应的贡献要高得多。直接库仑电离与同时多重电离和电子捕获相关的直接库仑离子化的综合作用可以更好地与测量值达成更好的一致性。
Multiple ionisation and electron capture are found to be vital mechanisms for K and L x-ray emissions along with the direct coulomb ionisation in heavy ion-atom collisions. Naturally, these two mechanisms may also be significant for M x-ray emissions also. However, these mechanisms associating with the M-shell are highly complex and not yet studied convincingly. We, in this work, have discussed about theoretical techniques to study these mechanisms in more general way, which in turn, almost resolved the wide gap between the theories and experiments regarding M-shell prevalent in literature up to a good extent. We have justified this technique with a few representative cases; for example, the silicon and sulphur projectile ions colliding with the gold and bismuth targets at beam energies ranging from 5 to 10 MeV. Here, we see that the capture contribution is much higher than that coming from the multiple ionisation effect. The combined effects of direct coulomb ionisation associated with simultaneous multiple ionisation and electron capture give a better agreement with the measurements up to a good extent.
