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Simultaneous energy analysis in a large angular range: A novel neutron spectrometer, its resolution and applications

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Zeitschrift für Physik B Condensed Matter

Abstract

A new type of crystal spectrometer for elastic and inelastic neutron scattering has been set up by modifying an existing flat-cone diffractormeter at the BER II-reactor in Berlin (West). The main difference to conventional triple axis spectrometers is the analyser part. It consists of large crystal plates which reflect the neutrons out of the horizontal plane into a curved multicounter. This allows simultaneous measurements in a large and continuous range of scattering angles for a constant energy transfer. The resolution function has been calculated and compared with experimental results. There is the possibility to focus acoustical phonons. We present applications together with experimental results such as quasielastic diffuse scattering in orientationally disordered crystals and inelastic scattering due to acoustical phonons. In combination with the flat-cone technique all elastic and inelastic scattering events of a single crystal can be collected in a systematic and efficient way.

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Authors and Affiliations

  1. Institut für Kristallographie der Universität Tübingen, Charlottenstrasse 33, D-7400, Tübingen 1, Federal Republic of Germany

    R. Born & D. Hohlwein

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  1. R. Born
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  2. D. Hohlwein
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in collaboration with the Hahn-Meitner Institut, Berlin (West)

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Born, R., Hohlwein, D. Simultaneous energy analysis in a large angular range: A novel neutron spectrometer, its resolution and applications. Z. Physik B - Condensed Matter 74, 547–555 (1989). https://doi.org/10.1007/BF01311401

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  • DOI: https://doi.org/10.1007/BF01311401

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