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

Christophorou教授得到了 实验物理化学课程，研究电子 附着在分子的电子激发态上。 这些测量在辐射化学中是有意义的，因为 example. 当电离辐射减慢时， 与物质的相互作用产生了大量的 分子或分子碎片和慢电子。 的 激发态俘获慢电子几率高 分子是克里斯托弗鲁教授的重要发现。 该项目将确定可以被激发的分子， 超激发态，并确定所观察到的 电子附着的极大横截面 低激发态是所有分子共有的。 这些 测量是困难的，因为首先必须产生 大量电子激发的分子携带 在它们松弛回到 接地电子状态。

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.