1 - 10 of 66 articles
We review our recent studies of muonium diffusion in cryocrystals. Atomic muonium (Mu = μ
) may be considered as a light isotope of hydrogen and so provides the prototypical light interstitial defect in these sytems, themselves the simplest of insulators. Experiments using the muon spin...
Computer simulations and experimental measurements of the disorder in the high pressure phases of nitrogen and of the mixed solid nitrogen–argon are reported. The vibrational frequency of nitrogen has been measured in those systems with Raman spectroscopy as a function of pressure, temperature,...
The time–relaxation model was proposed to describes the thermal conductivity of a low temperature phase of both pure solid CH
and with an impurity of Kr. On the basis of the model the conclusion are made about the phonon–rotation interaction in solid CH
and influence of impurity of Kr on...
The vibrational characteristics of the FCC–cryocrystals with substitutional impurities have been analyzed. A “non–central” impurity atom in environment of the “central” host atoms is considered. The difference between equilibrium interatomic distances
The anisotropy of thermal conductivity of parahydrogen crystals has been observed for the first time. The thermal conductivity measurements have been made on samples of different diameters at the temperature range from 2 to 8 K.
High resolution infrared spectroscopy of solid parahydrogen and that of molecules doped in solid parahydrogen are discussed. The quantum states of the excited states of both the hydrogen molecules themselves and the impurities in parahydrogen crystal are well defined, and show rich and narrow...
The recent discovery that inhaling polarized
Xe allows high resolution MRI images of the lungs to be made is having a large impact among the medical and physics communities. In fact, this technique could become the first high resolution, harmless diagnostic tool for several lung...
We have studied the possible creation of stable lattice defects induced by exciton self–trapping (STE) in solid neon. Generally speaking, the STE–bubbles accompanied with a plastic deformation are found to be at lower energies than a pure STE–bubble. Those with two vacancies in the first atomic...
The spin dynamics in the condensed phases of ambient–pressure molecular oxygen (liquid, plastic–crystalline (γ−), magnetically disordered (β−) and fully ordered α−O
) iS investigated by means of the concurrent use of neutron scattering and muon–spin relaxation. Above the α → β transition the...
Single crystals of methane were grown and cooled without strain within the range of 90 K to 15.5 K. The x-ray Laue diffraction technique was used to determine the crystal orientations. The technique of Brillouin spectroscopy was used to determine temperature dependence of the adiabatic elastic...
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