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Proceedings Paper

Mercuric iodide polycrystalline films on cylindrical substrates
Author(s): Neal E. Hartsough; Jan S. Iwanczyk; Nathan Skinner; Larry A. Franks; Bradley E. Patt; Marek Szawlowski
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Paper Abstract

Space-based gamma-ray spectrometers utilize active anticoincidence shielding to reduce the background caused by charged-particle interactions. Shielding improves the performance of gamma-ray spectrometers by reducing the effect of charged particle interactions which can not be distinguished from true gamma-ray interactions by the spectrometer. Active shields produce a blanking signal when a charged particle is detected, so that the signal from the spectrometer can be ignored during the spectrometer's charged-particle interaction. Anticoincidence shielding for space-born gamma-ray detectors requires a cylindrical-shell geometry and charged-particle sensitivity. To reduce the size, weight, and cost of the shielding we utilize a new direct-conversion charged-particle detector material, polycrystalline mercuric iodide. We present the results from planar film growth techniques for the particle-counting detection capabilities necessary for anti-coincidence shielding. We also show that films with similar detection properties were grown on curved substrates with the size and curvature needed to surround space-based spectrometer main detectors.

Paper Details

Date Published: 26 October 2004
PDF: 11 pages
Proc. SPIE 5541, Penetrating Radiation Systems and Applications VI, (26 October 2004); doi: 10.1117/12.566068
Show Author Affiliations
Neal E. Hartsough, Photon Imaging, Inc. (United States)
Jan S. Iwanczyk, Photon Imaging, Inc. (United States)
Nathan Skinner, Photon Imaging, Inc. (United States)
Larry A. Franks, Photon Imaging, Inc. (United States)
Bradley E. Patt, Gamma Medica, Inc. (United States)
Marek Szawlowski, Gamma Medica, Inc. (United States)

Published in SPIE Proceedings Vol. 5541:
Penetrating Radiation Systems and Applications VI
F. Patrick Doty; Richard C. Schirato; H. Bradford Barber; Hans Roehrig, Editor(s)

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