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Перегляд Физика низких температур, 2003, № 09-10 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Физика низких температур, 2003, № 09-10 за датою випуску

Сортувати за: Порядок: Результатів:

  • Ortho–para conversion in the solid hydrogens at high pressures 
    Strzhemechny, M.A.; Hemley, R.J. (Физика низких температур, 2003)
    At low pressures the ortho–para conversion in H₂ and D₂ is a slow process governed by the magnetic dipole interaction of nuclear magnetic moments, phonons being the main energy sink. As the pressure is raised to a few GPa ...
  • Heat transfer by low-frequency phonons and "diffusive" modes in cryocrystal solutions: the Kr–Xe syste 
    Konstantinov, V.A.; Orel, E.S.; Revyakin, V.P. (Физика низких температур, 2003)
    The temperature and volume dependences of the thermal conductivity of the Kr₁–ξ Xeξ solid solution are analyzed in a model in which heat is transferred by low-frequency phonons; above the phonon mobility edge this is done ...
  • Influence of the concentration of H₂–D₂ mixtures on their triple-point dewetting behavior 
    Tibus, Stefan; Sohaili, Masoud; Klier, Jürgen; Leiderer, Paul (Физика низких температур, 2003)
    Triple-point dewetting of pure gases like hydrogen and deuterium on solid substrates is a well-known phenomenon. This property persists even for the mixed system of H₂ and D₂. There exists an effective triple-point temperature ...
  • Observation of growth and structure of Kr films physisorbed on Ag(111) and Ag(100) 
    Aki Tosaka; Taro Mitake; Takashi Miura; Ichiro Arakawa (Физика низких температур, 2003)
    The structure and growth of two-dimensional crystals of Kr on Ag(111) and Ag(100) have been investigated by means of ellipsometry and eXtremely-low-current Low Energy Electron Diffraction (XLEED) under the quasi-equilibrium ...
  • Structures and optical properties of solid hydrogen at ultrahigh pressures 
    Hitose Nagara (Физика низких температур, 2003)
    We have studied the electronic energy bands for the structures whose primitive cell contains up to four molecules, with full optimization of the structures, based on the GGA and LDA band calculations. Above 250 GPa, the ...
  • Orientational ordering in monolayers of ortho–para hydrogen 
    Kokshenev, V.B.; Sullivan, N.S. (Физика низких температур, 2003)
    We discuss orientational ordering in monolayers of solid hydrogen in view of recent experimental findings in NMR studies of (ortho)c–(para)₁–c-hydrogen mixtures on boron nitride substrate. Analysis of the temperature-concentration ...
  • Influence of vibrational anharmonicity and vacancies on thermodynamic properties of the rare gas crystals 
    Karasevskii, A.I.; Holzapfel, W.B. (Физика низких температур, 2003)
    A statistical method is used to calculate thermodynamic properties of Ar, Kr and Xe (isobaric and isochoric heat capacity, bulk modulus, thermal expansion coefficient, interatomic distances, Grüneisen parameter), and good ...
  • Equilibrium helium film in the thick film limit 
    Klier, J.; Schletterer, F.; Leiderer, P.; Shikin, V. (Физика низких температур, 2003)
    For the thickness of a liquid or solid quantum film, like liquid helium or solid hydrogen, there exist still open questions about how the film thickness develops in certain limits. One of these is the thick film limit, ...
  • Translational-rotational interaction in dynamics and thermodynamics of 2D atomic crystal with molecular impurity 
    Antsygina, T.N.; Poltavskaya, M.I.; Chishko, K.A. (Физика низких температур, 2003)
    The interaction between the rotational degrees of freedom of a diatomic molecular impurity and the phonon excitations of a two-dimensional atomic matrix commensurate with a substrate is investigated theoretically. It is ...
  • A study on diffusion of H atoms in solid parahydrogen 
    Mizuho Fushitani; Takamasa Momose (Физика низких температур, 2003)
    Diffusion of hydrogen atoms in solid parahydrogen was investigated using high-resolution infrared spectroscopy. Hydrogen atoms were produced as by-products of a photoinduced reaction of nitric oxides embedded in solid ...
  • Tunneling dynamics in cryocrystals: localization and delocalization 
    Storchak, V.G. (Физика низких температур, 2003)
    The phenomenon of quantum diffusion of muonium in cryocrystals with rotational degrees of freedom is discussed. The quantum tunneling dynamics and electron transport are considered taking into account the effects of disorder.
  • Molecular probing of low-temperature incommensurate phases 
    Kikas, J.; Suisalu, A.; Laisaar, A.; Kuznetsov, An. (Физика низких температур, 2003)
    Two-dimensional (2D) excitation-emission spectra of biphenyl doped with free-base chlorin were measured at 5 K under various pressures up to 350 MPa. Besides the features related to zero-phonon lines and their phonon ...
  • Exciton relaxation in KBr and CaF₂ at low temperature: molecular dynamics study 
    Song, K.S. (Физика низких температур, 2003)
    We report here recent study of molecular dynamics simulation of exciton relaxation in several ionic crystals at low temperature. Both the lowest energy spin triplet and some of the low lying hole excited states are allowed ...
  • Role of the orientational subsystem in the expansion of pure CF₆, CHCl₃, C₆H₆, CCl₄ and N₂O with Kr impurity 
    Zholonko, N.N.; Tsibulin, V.V.; Sarwar, I. (Физика низких температур, 2003)
    The linear expansion coefficients of solid bulk samples of N₂O with Kr 5% impurity are measured by an absolute dilatometric method in comparison with pure N₂O in the temperature range 80–150 K. An additional unusual ...
  • Crystalline and amorphous polymeric solid nitrogen 
    Yakub, L.N. (Физика низких температур, 2003)
    The structure and thermodynamic functions of solid high-density nonmolecular nitrogen in the crystalline and amorphous phases are studied by a Monte Carlo simulation technique on the basis of the potential model proposed ...
  • Influence of rotational motion of molecules on the thermal conductivity of solid SF₆, CHCl₃, C₆H₆, and CCl₄ 
    Purskii, O.I.; Zholonko, N.N.; Konstantinov, V.A. (Физика низких температур, 2003)
    The thermal conductivity of solid SF₆, CHCI₃, C₆H₆, and CCl₄ was investigated by the linear-flow method under saturated vapor pressures in the temperature range from 80 K to the corresponding melting temperatures and then ...
  • Structural peculiarities of quench-condensed pure and argon-doped nitrous oxide 
    Solodovnik, V.V.; Danchuk, A.A. (Физика низких температур, 2003)
    Electron diffraction studies have been carried out for condensed N₂O and N₂O–Ar films. Deposition took place at substrate temperatures of 10 and 20 K. The growth process of N₂O deposits was studied. A strong effect of argon ...
  • Properties of solid hydrogen doped by heavy atomic and molecular impurities 
    Galtsov, N.N.; Prokhvatilov, A.I.; Shcherbakov, G.N.; Strzhemechny, M.A. (Физика низких температур, 2003)
    Using powder x-ray diffraction we studied the structural characteristics of normal and para hydrogen crystals doped with Ar, Kr, N₂, and O₂ impurities over the range from 5 K to the melting point of the hydrogen matrix. ...
  • Structural fluctuations and aging processes in deeply frozen proteins 
    Schlichter, J.; Ponkratov, V.V.; Friedrich, J. (Физика низких температур, 2003)
    Frozen proteins are nonergodic systems and are subject to two types of structural motions, namely relaxation and fluctuation. Relaxation manifests itself in aging processes which slow the fluctuations. Within certain ...
  • The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids 
    Beyer, M.K.; Savchenko, E.V.; Bondybey, V.E. (Физика низких температур, 2003)
    The stability and diffusion of protons and deuterons in rare gas matrices are reexamined. These are known to be stabilized in rare gas matrices in the form of linear, centrosymmetric Rg₂H⁺ cations. The elementary step in ...

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