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  • 1975-1979  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 3 (1977), S. 37-44 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The polarisation dependence of the absorption cross section must generally be taken into account in calculating Mössbauer absorption spectra of powder samples if they are partly polarised by an external magnetic field. The dependence of the intensity of the absorption lines on the aboorber thickness with an external field ofH a=50 kG is shown in the case of the paramagnetic specimen Fe(ClO4)2·6H2O. The calculation procedure is described and the results are compared with the usual thickness corrections neglecting polarisation effects.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 3 (1977), S. 213-220 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract TheL-pole transition is described by a Hermitian (2L+1)×(2L+1) matrix. The incoherent absorption process of the nuclei in a crystal allows to sum up the matrices of all transitions at the same energy. The result is an intensity matrix of the crystal. The evaluation of the polarisation state of dipole transitions dependent on the γ-direction can be done by very simple tensor equations.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 5 (1977), S. 265-269 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Mössbauer spectra of the powder sample of sodium nitroprusside have been measured in external magnetic fields at 4.2 K. The dependence of the absorption on thickness of the absorber has been studied. The fits including the polarization of the absorber by means of the applied field and the calculations of the convolution integral without polarization effects have been compared by a least squares value x2. The asymmetry parameter η of the EFG is η(4.2 K)=0.20±0.05.
    Type of Medium: Electronic Resource
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