Abstract
Focusing optics operating in the soft gamma-ray photon energy range can advance a range of scientific and technological applications that benefit from the large improvements in sensitivity and resolution that true imaging provides. An enabling technology to this end is multilayer coatings. We show that very short period multilayer coatings deposited on super-polished substrates operate efficiently above 0.6 MeV. These experiments demonstrate that Bragg scattering theory established for multilayer applications as low as 1 eV continues to work well into the gamma-ray band.
Highlights
In the quest for sensitive optics operating in the hard X-ray to soft gamma-ray photon energy range above 50 keV, two approaches have seen significant resources devoted to investigating applications and fielding instruments [1,2,3,4,5,6,7]
Focusing optics operating in the soft gamma-ray photon energy range can advance a range of scientific and technological applications that benefit from the large improvements in sensitivity and resolution that true imaging provides
We show that very short period multilayer coatings deposited on super-polished substrates operate efficiently above 0.6 MeV
Summary
In the quest for sensitive optics operating in the hard X-ray to soft gamma-ray photon energy range above 50 keV, two approaches have seen significant resources devoted to investigating applications and fielding instruments [1,2,3,4,5,6,7]. One of these approaches employ diffraction in bulk crystals, i.e. Laue transmission geometry [8], to concentrate rays in the focal plane. Applications, e.g. imaging of electron-positron annihilation for laser-plasma diagnostics [21] or nuclear medicine studies [22]
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