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The slowing-down of low-energy recoil atoms in solids and liquids investigated by nuclear resonance fluorescence

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Zeitschrift für Physik B Condensed Matter

Abstract

Using the nuclear resonance-fluorescence technique, the slowing down mechanisms of recoiling140Ce nuclei in La, LaMg3 and La2O3, are studied via the Dopler shift of the 1.596 MeV γ transition, following the β decay of140La. In LaMg3 the slowing down time shows a pronounced temperature dependence with a sharp drop close to the melting point. In the oxide, as well as in the metal with only a small oxygen content, the slowing down time is considerably smaller than in the pure metal. These results are in support of a model, describing the slowing down process in solids in terms of a damped oscillation, with a time dependence related to the phonon frequency spectrum.

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Authors and Affiliations

  1. II. Physikalisches Institut der Universität Göttingen, Bunsenstrasse 7-9, D-3400, Göttingen, Federal Republic of Germany

    G. Kehlenbeck, L. Ziegeler, F. Smend & M. Schumacher

Authors
  1. G. Kehlenbeck
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  2. L. Ziegeler
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  3. F. Smend
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  4. M. Schumacher
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Supported by Deutsche Forschungsgemeinschaft through contract Schu 222

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Kehlenbeck, G., Ziegeler, L., Smend, F. et al. The slowing-down of low-energy recoil atoms in solids and liquids investigated by nuclear resonance fluorescence. Z. Physik B - Condensed Matter 66, 147–151 (1987). https://doi.org/10.1007/BF01311649

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  • DOI: https://doi.org/10.1007/BF01311649

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