Abstract
Features of the transformations in cryocondensed samples of nitrous oxide under thermal cycling at temperatures near T = 40 K are studied. It is shown how the deformation and translational vibrational subsystems of the condensed state of nitrous oxide react to these transitions. Measured vibrational spectra of the samples and the amplitudes and positions of the absorption bands of the characteristic vibrations are used to determine the temperature and character of the thermally stimulated transitions in films of cryocondensed nitrous oxide. An analysis of these IR spectra indicates that the transition from the amorphous state of nitrous oxide to the crystalline state takes place in several stages that reflect the relaxation processes associated with particular vibrational modes of the nitrous oxide molecule. The differences in the transition temperatures are determined by the activation energies characteristic of these modes.