Optically-Enhanced Electron Attachment to Electronically- Excited Molecules and Photofragments

克里斯托霍鲁教授得到了实验物理化学计划的资助，该计划研究电子与分子电子激发态的附着性。例如，这些测量在辐射化学中很有意义。当电离辐射由于与物质的相互作用而减慢时，它会产生大量的激发分子或分子碎片和慢电子。被激发的分子捕获慢电子的高概率是克里斯托霍鲁教授的重要发现。这个项目将确定哪些分子可以被激发到超激发态，并确定观察到的极大的电子结合到低激发态的截面是否对所有分子都是共同的。这些测量是困难的，因为人们必须首先产生大量的电子激发分子，然后在它们松弛到基电子态之前进行电子附着测量。

Professor Christophorou is supported by a grant from the Experimental Physical Chemistry Program to study electron attachment to electronically excited states of molecules. These measurements are of interest in radiation chemistry, for example. When ionizing radiation slows down due to interactions with matter it produces an abundance of excited molecules or fragments of molecules and slow electrons. The high probability of capture of slow electrons by excited molecules is Professor Christophorou's important discovery. This project will identify molecules which can be excited to superexcited states and determine whether the observed extremely large cross sections for electron attachment to low-lying excited states are common to all molecules. These measurements are difficult because one has to first produce large numbers of electronically excited molecules then carry out electron attachment measurements before they relax back to the ground electronic state.