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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© 2006 Springer
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Courtois, P., Andersen, K.H., Bastie, P. (2006). Copper mosaic crystals for Laue lenses. In: von Ballmoos, P. (eds) Focusing Telescopes in Nuclear Astrophysics. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5304-7_20
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DOI: https://doi.org/10.1007/978-1-4020-5304-7_20
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Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-5303-0
Online ISBN: 978-1-4020-5304-7
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