Proposal For A High Reflectivity Laue Lens Tuned On The 511 keV Emission Line

Details Proposal For A High Reflectivity Laue Lens Tuned On The 511 keV Emission Line Proposal For A High Reflectivity Laue Lens Tuned On The 511 keV Emission Line

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011xau5.confe..42n&link_type=abstract

"The Second Ferrara Workshop on "X-ray Astrophysics up to 511 keV", held in Ferrara (Italy), September 14 - 16, 2011, article #4

Astronomy and Astrophysics

Astrophysics

Scientific paper

Study of the 511-keV emission line resulting from the electron-positron annihilation would be precious to search for the location of positron sources in our Galaxy. For this aim, we propose to use Ge crystals bent by grooves to concentrate the 511-keV photons with very high reflectivity. By including the absorption through the crystal, reflectivity has been calculated to be 85% for 3 mm-thick Ge crystal. The energy passband would be a water-bag distribution, as determined by the curvature of crystal. If such a distribution is tuned across the 511 keV line, very high signal-to-noise detection of such radiation is foreseen.

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