Hard X-Ray and Gamma-Ray Imaging with Solid State Detectors

Details Hard X-Ray and Gamma-Ray Imaging with Solid State Detectors Hard X-Ray and Gamma-Ray Imaging with Solid State Detectors

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995exa.....6..129g&link_type=abstract

Experimental Astronomy, Volume 6, Issue 4, pp.129-135

Astronomy and Astrophysics

Astronomy

Scientific paper

Solid state detectors are used in x-ray and gamma-ray astronomy primarily for their fine spectroscopy. For some cases (e.g., gamma-ray observations with Ge detectors), the spectroscopy and sensitivity requirements drive the design of the aperture systems and only moderate-quality imaging is possible. In other cases (e.g., hard x-ray observations), the detectors can be finely segmented for highquality imaging. The new room-temperature solid-state detectors like CdZnTe and HgI2 are naturally well-suited for imaging. Because of their high atomic numbers, photoelectric absorption dominates over Compton scattering to >200 keV. This, combined with their high densities, allows thin detectors to be used with segmented contacts. Position resolution in the detector plane can be on ˜100 μm scales giving sub-arcmin angular resolutions.

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