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Copper Mosaic Crystals for Laue Lenses

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Abstract

Large single crystals of copper with an uniform and very narrow mosaic spread between 25 seconds and 1 minute of arc are now available at I.L.L. This result is of great interest in the construction of a Laue lens for astrophysical applications for which such quality copper single crystals may be used. The X-ray diffraction properties of copper single crystals produced at I.L.L. were studied for x-ray energies ranging from 100 keV to 400 keV. Several monocrystalline plates with different thicknesses and mosaic distributions were then prepared from the as-grown crystals in order to measure their diffraction efficiency as a function of energy. As expected, the value of the peak reflectivity depends on the crystal thickness. Reflectivity measurements show the excellent properties of copper crystals for gamma-ray diffraction. A peak reflectivity of 24% was measured at 220 keV from a copper single crystal of 3.75 mm thickness having a mosaic spread of 1.5 minutes of arc. Some technical aspects on the preparation of copper single crystal plates are also discussed.

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References

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Authors and Affiliations

  1. Institut Laue Langevin, 6 rue Jules Horowitz, BP 156, 38042, Grenoble Cedex 9, France

    P. Courtois & K. H. Andersen

  2. Laboratoire de Spectrométrie Physique de Grenoble, UMR 5588 du CNRS, Université Joseph Fourier, GrenobleI, BP 87, 38402, Saint Martin d'Hères cedex, France

    P. Bastie

Authors
  1. P. Courtois
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  2. K. H. Andersen
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  3. P. Bastie
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Correspondence to P. Courtois.

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Courtois, P., Andersen, K.H. & Bastie, P. Copper Mosaic Crystals for Laue Lenses. Exp Astron 20, 195–200 (2005). https://doi.org/10.1007/s10686-005-9018-x

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  • DOI: https://doi.org/10.1007/s10686-005-9018-x

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