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Перегляд за темою "Low-Temperature Physics and Chemistry in Cryomatrice"

Репозиторій DSpace/Manakin

Перегляд за темою "Low-Temperature Physics and Chemistry in Cryomatrice"

Сортувати за: Порядок: Результатів:

  • A synchrotron radiation study of high-lying excited states of matrix-isolated atomic magnesium 
    Kerins, Paul; Healy, Brendan; McCaffrey, John G. (Физика низких температур, 2000)
    Previous steady-state and time-resolved luminescence spectroscopy of 3p ¹P₁ atomic magnesium, isolated in thin film samples of the solid rare gases, has been extended to include the higher energy 4p ¹P₁ excitation. Well ...
  • Atomic oxygen in solid deuterium 
    Danilychev, A.V.; Apkarian, V.A.; Kajihara, H.; Tanaka, S.; Koda, S. (Физика низких температур, 2000)
    Atomic oxygen is photogenerated in solid D₂ by 193 nm irradiation of samples initially doped with molecular oxygen. The atoms are detected by laser induced fluorescence over the O(¹S→¹D) transition, which occurs at 559 nm, ...
  • Deposition of mass-selected ions in neon matrices: CS₂⁺ and C₆F₆⁺ 
    Lorenz, Martin; Bondybey, Vladimir E. (Физика низких температур, 2000)
    Infrared and visible absorption spectra and laser-induced fluorescence (LIF) and excitation spectra are obtained for several simple cations deposited from a mass-selected ion beam. In the present preliminary study we ...
  • EXAFS studies of the trapping site structure for molecules isolated in cryogenic matrices 
    Roubin, P.; Varin, S.; Gauthier-Roy, B.; Crépin, C.; Flank, A.-M.; Lagarde, P.; Ténégal, F. (Физика низких температур, 2000)
    We present here results concerning the first attempt of determining the trapping site structure of molecules isolated in inert matrices at low temperature by the EXAFS (Extended X-ray Absorption Fine Structure) method. The ...
  • Experimental analysis of ¹³CO₂ infrared stimulated 
    Chabbi, H.; Dahoo, P.R.; Dubost, H.; Gauthier-Roy, B.; Vasserot, A.-M.; Abouaf-Marguin, L. (Физика низких температур, 2000)
    Vibrational stimulated emissions of CO₂ trapped in low temperature argon matrices have been found experimentally not only in the 16 mm region (v₂ manifold) but also at 10 mm (v₃ - v₁ transition) in the double trapping site ...
  • Formation and characterization of neutral krypton and xenon hydrides in low-temperature matrices 
    Lundell, Jan; Khriachtchev, Leonid; Pettersson, Mika; Räsänen, Markku (Физика низких температур, 2000)
    A family of rare-gas containing hydrides HXY (where X = Kr or Xe, Y is an electronegative fragment) is described. These molecules are experimentally prepared in low-temperature matrices by photodissociation of a ...
  • FTIR studies of annealing processes and irradiation effects at 266 nm in ozone-amorphous ice-mixtures 
    Chaabouni, H.; Schriver-Mazzuoli, L.; Schriver, A. (Физика низких температур, 2000)
    Fourier transform infrared (FTIR) spectroscopy is used to study the vibrational spectrum of ozone trapped in amorphous ice (a situation observed on icy satellites in the solar system). Evaporation of ozone from ice is ...
  • Infrared and EPR spectroscopic study of open-shell reactive intermediates: F + NH₃ in solid argon 
    Misochko, Eugenii Ya.; Goldschleger, Ilya U.; Akimov, Alexander V.; Wight, Charles A. (Физика низких температур, 2000)
    Mobile F atoms react with NH₃ molecules in an argon matrix at temperatures T=7–35 K. The open-shell NH₂–HF complex was observed by EPR and infrared spectroscopies as the main product of this reaction. The hyperfine constants ...
  • Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity 
    Freiman, Yu.A.; Tretyak, S.M.; Jeżowski, A. (Физика низких температур, 2000)
    The magnetic properties of oxygen pair clusters are investigated theoretically for different cluster geometries which can be realized by doping molecular cryomatrices with oxygen. Anomalous temperature and pressure behavior ...
  • Medium effects on the spectroscopy and intramolecular energy redistribution of C₆₀ cryogenic matrices 
    Chergui, M. (Физика низких температур, 2000)
    We review some of our works on the absorption, excitation and emission spectra of C₆₀ embedded in rare gas matrices while stressing the role of the environement. The gas phase resonant two-photon ionization spectrum of C₆₀ ...
  • Observation of the high resolution infrared absorption spectrum of CO₂ molecules isolated in solid parahydrogen 
    Tam, Simon; Fajardo, Mario E. (Физика низких температур, 2000)
    We report the observation of high resolution (0.008 cm⁻¹) infrared absorption spectra of CO₂ molecules isolated in solid parahydrogen(pH₂) matrices at T=2.4 to 4.8 K. Several extremely sharp (0.01 to 0.04 cm⁻¹ full-width ...
  • Optical spectra of CuO₂ and matrix effect upon its structure 
    Caspary, Nico; Savchenko, Elena V.; Thoma, Anton; Lammers, Andreas; Bondybey, Vladimir E. (Физика низких температур, 2000)
    Optical absorption and laser-induced fluorescence (LIF) spectra of CuO₂ in solid matrices are investigated, and previous visible studies are extended into the infrared. Several new electronic states are observed and their ...
  • Physical aspects of matrix isolation technique: FTIR studies on CO and CO₂ in O₂ and N₂ matrices 
    Minenko, Maksym; Vetter, Martin; Brodyanski, Alexander P.; Jodl, Hans J. (Физика низких температур, 2000)
    The matrix isolation technique is traditionally used to investigate the properties of the matrix-isolated species themselves or to solve some special questions of the theory of defects in solid. We showed here that the ...
  • Properties of solid ³He inclusions embedded in crystalline ⁴He matrix at ultralow temperatures 
    Ganshin, A.; Grigor`ev, V.; Maidanov, V.; Mikhin, N.; Penzev, A.; Polev, A.; Rudavskii, E.; Rybalko, A. (Физика низких температур, 2000)
    A study is made of the kinetic properties of the quantum systems formed in dilute solid mixtures of ³He in ⁴He at ultralow temperatures as a result of the first-order phase transition known as phase separation. The system ...
  • Reactions of laser-ablated aluminum atoms with nitrogen during condensation at 10 K. Infrared spectra and density functional calculations for Alx Ny molecular 
    Andrews, Lester; Zhou, Mingfei; Chertihin, George V.; Bare, William D.; Hannachi, Yacine (Физика низких температур, 2000)
    Laser-ablated aluminum atoms react with dinitrogen on condensation at 10 K to form N₃ radicals and the subject molecules, which are identified by nitrogen isotopic substitution, further reactions on annealing, and comparison ...
  • Rovibrational transitions and nuclear spin conversion of methane in parahydrogen crystals 
    Miki, Masaaki; Momose, Takamasa (Физика низких температур, 2000)
    Solid parahydrogen is an excellent matrix for matrix-isolation spectroscopy because of its high spectral resolution. Here we describe the rovibrational structure and nuclear spin conversion of CH₄ embedded in parahydrogen ...
  • Sound propagation in liquid He in impurity-helium solids 
    Kiselev, S.I.; Khmelenko, V.V.; Lee, D.M. (Физика низких температур, 2000)
    The observed features of the attenuation of ultrasound in Im–He samples created after the introduction of impurity particles (D₂,N₂, Ne, Kr) in a volume of helium II show that a porous substance consisting of a loosely ...
  • Spectroscopy of yttrium dimers in argon matrices 
    Fang, Li; Chen, Xiaoyu; Shen, Xiaole; Liu, Yifei; Lindsay, D.M.; Lombardi, John R. (Физика низких температур, 2000)
    The absorption and resonance Raman spectra of yttrium dimers (Y₂) in argon matrices are measured for the first time. The absorption spectrum (scattering depletion spectrum SDS) shows a weak, broad transition centered near ...
  • Structure characteristics of methane-doped solid normal hydrogen 
    Galtsov, N.N.; Prokhvatilov, A.I.; Strzhemechny, M.A. (Физика низких температур, 2000)
    Structure studies of the quantum crystal of solid normal hydrogen doped with methane and deuteromethane are carried out by powder x-ray diffraction within the temperature range 5 to 12 K. The concentration of the dopants ...
  • Thermal conductivity of solid krypton with methane admixture 
    Dudkin, V.V.; Gorodilov, B.Ya.; Krivchikov, A.I.; Manzhelii, V.G. (Физика низких температур, 2000)
    The thermal conductivity of CH₄–Kr solid solutions is investigated at CH₄ concentrations 0.2–5.0% in the temperature range 1.8–40 K. It is found that the temperature dependence of the thermal conductivity has features ...