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  • 41.60.Ap  (1)
  • solvent effect  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Forward coherent inelastic Mössbauer scattering of synchrotron radiation (1998)
    Springer
    JETP letters 67 (1998), S. 8-14 
    Details
    ISSN: 1090-6487
    Keywords: 76.80.+y ; 41.60.Ap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theoretical analysis is presented of the possibilities of satisfying the conditions of phase matching (PM) in the coherent inelastic Mössbauer scattering (CIMS, which is scattering accompanied by the creation or annihilation of phonons) of synchrotron radiation (SR) and the conditions under which the maximum intensity of CIMS obtains are studied. Of the two types of CIMS — 1) participation of phonons in a scattering event only in the stage of absorption or only during re-emission of a photon, and 2) participation of phonons in both stages of scattering — PM is possible only in the first. The process in which phonons participate only at the photon absorption stage leads to efficient conversion of the SR from a wide spectral line into a narrow line, determined by the width of the Mössbauer transition. Photons of this type of CIMS effectively possess a higher penetrating power than the standard Mössbauer radiation, and their spectral distribution is shifted somewhat in the direction of low frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567620
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of polarity and temperature on photoluminescence of a europium(III) chelate (1996)
    Springer
    Russian chemical bulletin 45 (1996), S. 1596-1600 
    Details
    ISSN: 1573-9171
    Keywords: europium(III) ; complexes ; luminescence ; solvent effect ; temperature effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The relative photoluminescence yield for (1,10-phenanthroline)europium(III) tris-thenoyltrinuoroacetonate (Eu(tta)3Phen). an efficient enhancer of chemiluminescence, has been measured under the conditions (temperatures and solvents) specific for the oxidation of hydrocarbons. The yield is independent of viscosity and the presence of a heavy atom in the solvent, but the higher the polarity of the medium, the more the yield decreases as the temperature increases. The effect is interpreted as an acceleration of radiationless deactivation occurringvia the mechanism of electron transfer from a ligand to the excited Eu3+ ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01431793
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    Paper (German National Licenses)
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