High-Resolution UV Laser Spectroscopy in Atoms, Molecules, and Ions

该实验研究计划的目的是高分辨率的激光光谱系统选择其重要性的基础物理。一个实验是测量单离子化铁和其他物质的精细结构间隔。第二个是氢分子电离势（IP）的新测定，它作为理论处理这个最简单的中性分子的基准。第三个实验涉及另一个双电子系统中的一个大大改进的测定，即氦原子中的1 S-2S间隔。第四个实验遵循最近的理论趋势，将其推广到三电子系统，即原子锂，其中IP和6Li-7 Li同位素位移将被准确确定。所有四个实验都利用相同的基本激光方案，包括通过使用由注入种子Nd：YAG激光器泵浦的放大器对连续激光进行脉冲放大。该计划的更广泛影响将涉及教育，国际合作和多样性的努力。

This experimental research program is aimed at high-resolution laser spectroscopy on systems chosen for their importance to fundamental physics. One experiment is a measurement of fine-structure intervals in singly ionized iron and other species. The second is a new determination of the ionization potential (IP) of the hydrogen molecule, which serves as a benchmark for theoretical treatments of this simplest of neutral molecules. The third experiment involves a much-improved determination in another two-electron system, the 1S-2S interval in atomic helium. The fourth experiment follows recent theoretical trends by generalizing to a three-electron system, atomic lithium, in which the IP and the 6Li-7Li-isotope shift will be accurately determined. All four experiments take advantage of the same basic laser scheme, involving pulsed amplification of a cw laser by use of amplifiers pumped by an injection-seeded Nd:YAG laser. The broader impact of the program will involve education, international collaborations and efforts in diversity.