Rotational Excitations in Solid Hydrogen

固体氢的最低压力相包括分子氢的六方密堆积结构。X射线和中子研究可以探测到核的平均位置，但取向行为更为复杂。在最低压力下的拉曼光谱表明，分子采取自由转子行为。然而，当压力增加时，单个旋转能级的识别变得更加复杂，因为这些低频带显着加宽。本计画旨在发展受抑制量子转子之拉曼讯号理论。将预测的光谱与实验数据进行比较，将提供新的洞察力在压力下的氢的固相的性质。

The lowest pressure phase of solid hydrogen comprises a hexagonally close packed structure of molecular hydrogen. X-ray and neutron studies can detect the mean nuclear position, but the orientational behaviour is more complicated. Raman spectroscopy at the lowest pressures, shows that the molecules adopt free rotor behaviour. However when pressure increases the identification of the single rotational levels becomes more complicated, as these low frequency bands significantly broaden. This project aims to develop the theory for the Raman signal from an inhibited quantum rotor. Comparing the predicted spectra with experimental data will provide new insight into the nature of the solid phases of hydrogen under pressure.