RUI: Spectroscopy and Structure of Negative Ions

本项目通过两个系列的实验来研究光子与负离子的相互作用。第一个研究将使用交叉千伏离子束/可调谐激光方法在静电场中高精度地测量阈值附近的光剥离截面。将在高达几千伏/厘米的电场中研究I-和Bi-，以表征再散射效应，在该效应中，新出现的电子的波函数由电场势反映，并由现在中性的原子核散射。随后，教职员工和学生研究人员将研究新发现的Os-中独特激发态的静电效应。第二系列相辅相成的实验将并行进行。利用先进光源(ALS)作为高能光子源，研究了C-和B-的内壳层光剥离。

This project focuses on the study of the interactions of photons with negative ions in two series of experiments. The first studies will use the crossed kilovolt ion beam/tunable laser method to measure high precision photodetachment cross sections near threshold in a static electric field. Both I- and Bi- will be studied in electric fields up to several kV/cm to characterize rescattering effects in which the emerging electron's wavefunction is reflected by the electric field potential and scattered by the now neutral atomic core. Subsequently, the faculty and student researchers will investigate static electric effects on the newly discovered unique excited states in Os-. The second series of complementary experiments will proceed in parallel. Using the Advanced Light Source (ALS) as a source of high energy photons, inner-shell photodetachment from C- and B- will be investigated.