The first observations were reported of the vibrational Raman spectrum of H molecules in crystalline material that had been treated with H atoms at 400C. It was found that the Raman spectrum of H2 at room temperature exhibited a frequency shift of about 4158/cm, and a very broad half-width of about 34/cm. An isotope shift was also detected at about 2990/cm in material which had been treated with D atoms at 400C. It was noted that the frequency shifts of the observed lines were in good agreement with those that had been reported for H2 and D2 in the gaseous, liquid and solid phases.

K.Murakami, N.Fukata, S.Sasaki, K.Ishioka, Z.M.Kitajima, S.Fujimura, J.Kikuchi, H.Haneda: Physical Review Letters, 1996, 77[15], 3161-4