Charge-induced absorption in proton-beam-irradiated solid hydrogen deuteride

Abstract

The charge-induced absorption spectrum in the fundamental band of solid hydrogen deuteride irradiated by a beam of 15 MeV protons has been observed. Four charge-induced absorption lines were seen, including one due to a small hydrogen impurity in the sample. Two of the three HD lines are caused by electron bubbles in the solid. These lines have been named Q1(0)− and S1(0)−, indicating the parent transition and the sign of the perturbing charge. Under higher resolution, the third line, named Q1(0)+, shows a doublet structure. The possibility that this doublet structure is caused by [Formula: see text] cluster ions is examined. A comparison of the timing and temperature dependence of the charge-induced lines in HD is made with previous results in D2.