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Proceedings Paper

New position-sensitive detector for gamma-ray astronomy in the energy range of 15 keV to 1 MeV
Author(s): Zhong He; David Ramsden
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Paper Abstract

A new position-sensitive gamma-ray detector to cover the energy band from 15 keV to 1 MeV has been investigated. The detector concept is based on the use of an array of discrete 1 X 1 X 5 cm phoswich scintillation bars viewed by position-sensitive photomultiplier tube (PSPMT). The test results show that the energy resolution, about 40% FWHM at 60 keV and 12% FWHM at 511 keV, can be easily obtained when using CsI(Na) crystals. The point- spread function for the location of each event is smaller than the cross section of a single bar over the entire energy range. This means that there is virtually no ambiguity in locating signals from different bars. The outputs from the CsI(Na) and GSO veto crystals can be distinguished by a pulse-shape discriminator designed especially for this system. Those multi- site events which deposit energy only in the CsI(Na) array can be recognized using the position sensing capability of the tube.

Paper Details

Date Published: 19 October 1993
PDF: 7 pages
Proc. SPIE 1948, Astroparticle Physics and Novel Gamma-Ray Telescopes, (19 October 1993); doi: 10.1117/12.161373
Show Author Affiliations
Zhong He, Univ. of Southampton (United Kingdom)
David Ramsden, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 1948:
Astroparticle Physics and Novel Gamma-Ray Telescopes
David B. Cline, Editor(s)

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