학술논문
The optimization of small CsI(Tl) gamma-ray detectors
Document Type
Conference
Author
Source
IEEE Conference on Nuclear Science Symposium and Medical Imaging Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE. :135-137 vol.1 1992
Subject
Language
Abstract
As part of the INTEGRAL (International Gamma-Ray Astrophysical Laboratory) project, CsI(Tl) scintillation elements with a cross-sectional area of 1 cm/sup 2/ and between 1 and 6 cm in length have been developed to form the basis of the imager detector plane. The crystal preparation and wrapping, crystal geometry, optical coupling, and matching to the photodiode have all been optimized in order to maximize the light output from the crystal, and hence produce the lowest energy threshold and best spectral resolution for any given readout electronics. Energy resolutions of 22% of 122 keV and 7% at 662 keV have been obtained using a 1 cm/sup 3/ crystal on a 10*10 mm crystal. With standard laboratory electronics, a low energy threshold of approximately 40 keV has been obtained.ETX