Rare Gases and Other Simple Systems at High Pressures

该程序致力于研究极端压力和低温下简单系统的动态、电学和光学性质。实验中使用的技术主要是光的非弹性散射。在最近的过去，大部分的光散射都是自发拉曼散射。最近，该实验室增加了进行相干反斯托克斯拉曼散射(CARS)和其他四波混频实验的设施。其中，双光子共振正在被用来探测砧座单元内样品的电子结构。多光子技术的一个特别优点是能够检查具有高于高压窗口(例如，钻石)透明的最大光子能量的能量的电子态。他们建议在一个研究极压下氢和氢以及氧、氮和苯中的电子激发态的计划中利用这一优势。

This program is dedicated to the study of dynamic, electronic, and optical properties of simple systems at extreme pressures and low temperatures. The techniques used in the experiments are principally inelastic scattering of light. In the recent past, most of the light scattering has been spontaneous Raman scattering. More recently the laboratory added facilities to do coherent anti-Stokes Raman Scattering (CARS) and other four wave mixing experiments. Among these, two-photon resonances are being exploited to probe electronic structure of samples within anvil cells. A particular advantage of the multiphoton technique is the ability to examine electronic states having energies higher than the maximum photon energy at which high pressure windows, e.g. diamond, are transparent. They propose to exploit this advantage in a program of study of electronic excited states in hydrogen and deuterium and in exygen, nitrogen, and benzene at extreme pressures.