Physics of reflective optics for the soft gamma-ray photon energy range

Mónica Fernández-Perea, Marie-Anne Descalle, Regina Soufli, Klaus P. Ziock, Jennifer Alameda, Sherry L. Baker, Tom J. McCarville, Veijo Honkimäki, Eric Ziegler, Anders Clemen Jakobsen, Finn Erland Christensen, Michael J. Pivovaroff

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Traditional multilayer reflective optics that have been used in the past for imaging at x-ray photon energies as high as 200 keV are governed by classical wave phenomena. However, their behavior at higher energies is unknown, because of the increasing effect of incoherent scattering and the disagreement between experimental and theoretical optical properties of materials in the hard x-ray and gamma-ray regimes. Here, we demonstrate that multilayer reflective optics can operate efficiently and according to classical wave physics up to photon energies of at least 384 keV. We also use particle transport simulations to quantitatively determine that incoherent scattering takes place in the mirrors but it does not affect the performance at the Bragg angles of operation. Our results open up new possibilities of reflective optical designs in a spectral range where only diffractive optics (crystals and lenses) and crystal monochromators have been available until now. © 2013 American Physical Society.
Original languageEnglish
Article number027404
JournalPhysical Review Letters
Volume111
Issue number2
Number of pages5
ISSN0031-9007
DOIs
Publication statusPublished - 2013

Keywords

  • Gamma rays
  • Incoherent scattering
  • Multilayers
  • Photons
  • Reflection

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