An optically detected electron nuclear double resonance signal was detected in amorphous hydrogenated material which had been prepared under 2 different sets of conditions. Differing changes in the line-shape were observed after light exposure of the two types of sample. A similar line-shape change was observed upon applying pressure. It was proposed that probable explanations for the line-shape change included light-induced H migration, and an effect of dangling bonds upon spin diffusion.

M.Kondo, K.Morigaki: Journal of Non-Crystalline Solids, 1993, 164-166[1], 227-30