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Observed difference between the probabilities of recoilless resonance absorptionf′ and reemissionf″ of gamma-quanta in single crystals of Na2[Fe(CN)5NO]·2 H2O

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Zeitschrift für Physik B Condensed Matter

Abstract

The recoilless absorption probability factor,f′, and recoilless reemission,f″, both measured on Na2[Fe(CN)5NO]·2 H2O single crystals using the “black” filter technique, were found to be different. Unexpectedly, the results found weref″>f′. In the calculation off″, selfabsorption in the scatterer, non-ideality of the “black” filter and the influence of non-resonant scattering processes have all been taken into account. By varying the scattering geometry for the incoming and outgoing γ-beam relative to the crystallographic axes only a change in the reemitted valuesf″ a, f″b, f″c could be detected because of the long lifetime of the excited nucleus (∼10−7 s) relative to the lattice vibration frequencies (∼1012 Hz).

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Authors and Affiliations

  1. Faculty of Physics, Department of Atomic Physics, Sofia University, 5 Anton Ivanov bul., BG-1126, Sofia, Bulgaria

    V. Angelov, V. Rusanov & Ts. Bonchev

  2. Institut für Kristallographie der Universität, Zülpicher Strasse 49, W-5000, Köln 41, Germany

    Th. Woike & S. Haussühl

Authors
  1. V. Angelov
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  2. V. Rusanov
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  3. Ts. Bonchev
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  4. Th. Woike
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  5. S. Haussühl
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Angelov, V., Rusanov, V., Bonchev, T. et al. Observed difference between the probabilities of recoilless resonance absorptionf′ and reemissionf″ of gamma-quanta in single crystals of Na2[Fe(CN)5NO]·2 H2O. Z. Physik B - Condensed Matter 83, 39–44 (1991). https://doi.org/10.1007/BF01314395

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  • DOI: https://doi.org/10.1007/BF01314395

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