COLLISIONALLY COOLED SPECTROSCOPY: PRESSURE BROADENING BELOW 5 K

Abstract

Author Institution: Department of Physics, Duke UniversityThe results of experiments on CO, $CH_{3}F, H_{2}S, NO, DCl, OCS$, and HDO pressure broadened by He in the region 1.8 - 4.2 K will be described. It was found that the pressure broadening cross sections varied widely with species, state and temperature. Comparison with room temperature cross sections also showed a large variation with dramatic rises and declines seen among the different species and states. We will compare our results with theoretical expectations and predictions