We have studied the temperature dependence of the nuclear transverse and longitudinal relaxation times in solid H2 for ortho concentrations 10-3 < X < 10-2 between 0.4 K and the triple point, 13.9 K. We find a striking temperature dependence in T2 over the whole temperature range. This new effect is ascribed to a coupling between molecular rotation and lattice vibrations, which is brought into evidence by the narrow width of the spectral density of the rotational fluctuations at low X.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Chemistry