Driving spectral resolution to the noise limit in semiconductorgamma detector arrays
Lachish, U.
Guma Sci., Rehovot;
This paper appears in: Nuclear Science, IEEE Transactions on
Publication Date: Jun 2001
Volume: 48,
Issue: 3
On page(s): 520-523
Meeting Date: 10/15/2000 - 10/20/2000
Location: Lyon, France
ISSN: 0018-9499
References Cited: 9
CODEN: IETNAE
INSPEC Accession Number: 7032029
Digital Object Identifier: 10.1109/23.940110
Posted online: 2002-08-07 00:14:09.0
Abstract
Shape-time adjustment of a standard detector circuit improves the
resolution of a single pixel of a detector array to the noise limit. The
steady flow of gamma generated charge, in a detector bulk, induces fast
signal build-up, as the charge arrives near a single pixel. The build-up
period is shorter than the electron transition time from contact to
contact. The circuit shape-time response is adjusted to overlap with the
fast build-up period. The shape time determines a distance range,
extending from the negative contact, where the detector signal does not
depend on the position of photon absorption. The noise limited line
width is consistent with published data of higher line resolution than
predicted by the small pixel theory
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