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  • 07.85.Qe  (1)
  • solvent effect  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Suppression of coherent inelastic Mössbauer scattering of synchrotron radiation at grazing angles of incidence (1998)
    Springer
    JETP letters 68 (1998), S. 287-294 
    Details
    ISSN: 1090-6487
    Keywords: 76.80.+y ; 07.85.Qe ; 78.70.Ck
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Coherent inelastic Mössbauer scattering (CIMS) of synchrotron radiation (SR) by an isotopic interface (a flat interface between two regions of matter differing in the concentration of the Mössbauer isotope) at grazing angles of incidence of the SR beam is investigated theoretically. The qualitative features of CIMS as compared with conventional optics at small grazing angles of the SR beam are determined. Specifically, it is shown that for CIMS by an isotopic interface, instead of the phenomenon of total external (internal) reflection well known in optics, total suppression of reflection of the CIMS beam occurs at grazing angles of the SR beam less than a critical angle, and a maximum of the transmission and reflection at distinguished CIMS frequencies appears near the critical angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567861
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    Paper (German National Licenses)
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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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