Beryllium is being adopted for plasma facing walls in fusion reactors. This has led to the observation of emissions from the A 2 Π state of beryllium hydride. Use of these emissions to monitor Be erosion requires electron impact excitation rates. Cross sections for electron impact vibrational excitation within the X 2 Σ + state and vibrationally resolved electronic excitation to the A 2 Π state are reported for BeH, BeD and BeT. Electron collisions are studied at a range of internuclear separations using the UK molecular R-matrix (UKRmol+) codes. Electronic excitation is studied both within the Franck–Condon approximation and by explicit averaging of the T-matrix elements. It is found that (a) inclusion of the effect of higher partial waves using the Born approximation leads to significant increases in the cross sections and (b) the Franck–Condon approximation underestimates the importance of collisions for which the vibrational state chan...

中文翻译：

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振动解析电子轰击BeH

聚变反应堆中面向等离子体的壁采用了铍。这导致观察到氢化铍的A 2Π状态的发射。使用这些排放物监测Be腐蚀需要电子撞击激发速率。报告了BeH，BeD和BeT在X 2Σ+状态下电子撞击振动激发的截面以及在A 2Π状态下振动分解的电子激发的截面。使用UK分子R矩阵（UKRmol +）代码在一系列核间距之间研究电子碰撞。在Franck-Condon近似范围内和通过对T矩阵元素进行显式平均研究了电子激发。