Перегляд за темою "Физические свойства криокристаллов"

Результати 1-20 з 83

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Broken symmetry phase transition in solid HD: a manifestation of quantum orientational melting

Freiman, Yu.A.; Tretyak, S.M.; Jezowski, A.; Hemley, R.J. (Физика низких температур, 1998)

Theoretical study of the broken symmetry phase (BSP) transition line in solid HD reveals that its anomalous features provide evidence for quantum orientational melting. The observations of unusual reentrant behavior is a ...
Diffusion of hydrogen in rare gas solids: neutral H atoms and H⁺ protons

Beyer, M.; Niedner-Schatteburg, G.; Bondybey, V.E.; Savchenko, E.V. (Физика низких температур, 1999)

In this letter we review and compare the available information about the stability and spectroscopy of the hydrogen atoms and protons in rare-gas solids. Mechanism of the H⁺ duffusion involving protonated rare-gas dimer ...
Dynamic characteristics of light emission accompanying cryocondensation of nitrous oxide and ethanol

Drobyshev, A.; Aldiyarov, A.; Korshikov, E.; Strzhemechny, Y.M. (Физика низких температур, 2015)

We report new results in the study of cryoradiation accompanying the condensation of some gas. The main objectives of this research are: (i) check a broader range of substances for their ability to cryoradiation; (ii) ...
Electron-impact desorption of metastable particles from CO films

Shi, H.; Cloutier, P.; Sanche, L. (Физика низких температур, 1998)

The impact of monochromatic low-energy electrons (4–52 eV) is found to induce desorption of metastable particles (MP) from multilayer films formed by condensing CO gas on a Pt(111) substrate held at 20 K. The results are ...
EPR spectra of deuterated methyl radicals trapped in low temperature matrices

Dmitriev, Yu.A. (Физика низких температур, 2005)

EPR spectra of CHD₂, and CD₃ radicals have been investigated in low-temperature matrices of H₂, D₂, and Ne at temperatures 1.6–4.2 K. A method of condensation from the gas phase on a cold substrate has been used. With ...
FTIR/PCA study of propanol in argon matrix: the initial stage of clustering and conformational transitions

Doroshenko, I.; Balevicius, V.; Pitsevich, G.; Aidas, K.; Sablinskas, V.; Pogorelov, V. (Физика низких температур, 2014)

FTIR spectra of 1-propanol in an argon matrix were studied in the range 11 to 30 K. Principal component analysis of dynamic FTIR spectra and nonlinear band shape fitting has been carried out. The peaks of monomer, open ...
Heat capacity of methane-krypton solid solutions. Conversion effect

Minchina, I.Ya.; Manzhelii, V.G.; Bagatskii, M.I.; Sklyar, O.V.; Mashchenko, D.A.; Pokhodenko, M.A. (Физика низких температур, 2001)

The heat capacity of Kr-nCH₄ solid solutions with the concentrations n= 1; 5; 10% and of the solid solution Kr-1%CH₄-0.2%O₂ has been studied at 0.7-8 K. The contributions of Crot to the heat capacity of the solutions caused ...
Influence of an orthodeuterium impurity on the thermal conductivity of solid parahydrogen

Korolyuk, O.A.; Gorodilov, B.Ya.; Krivchikov, A.I.; Manzhelii, V.G. (Физика низких температур, 1999)

The thermal conductivity of solid parahydrogen with orthodeuterium impurity at the impurity concentration from 0.01 to 1% has been studied in the temperature range from 1.8 to 9 K. The nonlinear concentration dependence ...
Infrared spectroscopy of solid normal hydrogen doped with CH₃F and O₂ at 4.2 K: CH₃F:O₂ complex and CH₃F migration

Abouaf-Marguin, L.; Vasserot, A.-M. (Физика низких температур, 2011)

Double doping of solid normal hydrogen with CH₃F and O₂ at about 4.2 K gives evidence of (ortho-H₂)n:CH₃F clusters and of O₂:CH₃F complex formation. A FTIR analysis of the time evolution of the spectra, in the ν₃ C–F ...
Isochoric thermal conductivity of solid nitrogen

Konstantinov, V.A.; Manzhelii, V.G.; Revyakin, V.P.; Sagan, V.V. (Физика низких температур, 2005)

The isochoric thermal conductivity of solid nitrogen has been investigated on four samples of different densities in the temperature interval from 20 K to the onset of melting. In α-N₂ the isochoric thermal conductivity ...
Lattice distortion in hcp rare gas solids

Grechnev, A.; Tretyak, S.M.; Freiman, Yu.A. (Физика низких температур, 2010)

The lattice distortion parameter δ≡c/a – √8/3 has been calculated as a function of molar volume for the hcp phases of He, Ar, Kr, and Xe. Results from both semi-empirical potentials and density functional theory are ...
Low-temperature dynamics of matrix isolated methane molecules in fullerite C₆₀. The heat capacity, isotope effects

Bagatskii, M.I.; Manzhelii, V.G.; Sumarokov, V.V.; Dolbin, A.V.; Barabashko, M.S.; Sundqvist, B. (Физика низких температур, 2014)

The heat capacity of the interstitial solid solution (CH₄)₀.₄C₆₀ has been investigated in the temperature interval 1.4–120 K. The contribution of CH4 molecules to the heat capacity of the solution has been separated. The ...
Low-temperature electrical discharge through solid xenon

Gordon, E.B.; Matyushenko, V.I.; Sizov, V.D.; Smirnov, B.M. (Физика низких температур, 2008)

The uniform self-sustained electrical discharge through solid xenon has been realized and studied. The multiplication of electrons proceeds in the noble gas above the xenon crystal interface whereas a positive feedback ...
Low-temperature orientational ordering and possible domain structures in C₆₀

Loktev, V. M.; Khalack, J.N.; Pogorelov, Y.G. (Физика низких температур, 2001)

Based on a simple model for the ordering of hexagons on a square planar lattice, an attempt is made to consider the possible structure of С₆₀ fullerite in its low-temperature phase. It is shown that hexagons representing ...
Mean-field theory of orientational ordering in rigid rotor models with identical atoms: spin conversion and thermal equilibration

Hetényi, B. (Физика низких температур, 2010)

In coupled rotor models which describe identical rotating nuclei the nuclear spin states restrict the possible angular momenta of each molecule. There are two mean-field approaches to determining the orientational phase ...
Molecular rotation in p-H₂ and o-D₂ in phase I under pressure

Freiman, Yu.A.; Tretyak, S.M.; Goncharov, A.F.; Mao, H.; Hemley, R.J. (Физика низких температур, 2011)

The orientational order parameter, rotational ground-state energy, and lattice distortion parameter (the deviation of the c/a ratio from the ideal hcp value 1.633) in hcp lattice of phase I of p-H₂ and o-D₂ are calculated ...
Orientational order parameter in α-N₂ from x-ray data

Galtsov, N.N.; Klenova, O.A.; Strzhemechny, M.A. (Физика низких температур, 2002)

A method is suggested and validated for the deduction of orientational order parameter values h in molecular crystals consisting of diatomics directly from integrated x-ray diffraction intensities. This method is applied ...
Refractive indices and density of cryovacuum-deposited thin films of methane in the vicinity of the α–β-transition temperature

Drobyshev, A.; Aldiyarov, A.; Sokolov, D.; Shinbayeva, A. (Физика низких температур, 2017)

Experimental studies of the effect of methane condensation temperature on the value of the refractive index and density of the resulting thin films are reported. The main unit of the installation is a high-vacuum chamber, ...
Refractive indices vs deposition temperature of thin films of ethanol, methane and nitrous oxide in the vicinity of their phase transition temperatures

Drobyshev, A.; Aldiyarov, A.; Sokolov, D.; Shinbayeva, A.; Tokmoldin, N. (Физика низких температур, 2017)

This paper presents results of an experimental study of the dependence of deposition temperature on the refractive in dices of ethanol, methane and nitrous oxide, in the form of cryovacuum deposited thin films, in the ...
The effect of n-H₂ impurity on the heat capacity of solid Ne

Bagatskii, M.I.; Minchina, I.Ya.; Parbuzin, V.S. (Физика низких температур, 2009)

The alloy of Ne - 5.1%n-H₂ was investigated calorimetrically under equilibrium vapor pressure in an interval of 0.9–25 K. The magnitudes and the temperatures dependencies of the heat capacity Cso₁(T) of the alloy at T = ...

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