The optimization of small CsI(Tl) gamma-ray detectors

Author

Bird, A.J. ; Carter, T. ; Dean, A.J. ; Ramsden, D. ; Swinyard, B.M.

Author_Institution

Dept. of Phys., Southampton Univ., UK

fYear

1992

fDate

25-31 Oct 1992

Firstpage

135

Abstract

As part of the INTEGRAL (International Gamma-Ray Astrophysical Laboratory) project, CsI(Tl) scintillation elements with a cross-sectional area of 1 cm² 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 cm³ crystal on a 10×10 mm crystal. With standard laboratory electronics, a low energy threshold of~40 keV has been obtained

Keywords

caesium compounds; gamma-ray detection and measurement; materials preparation; scintillation counters; tellurium; 1 to 6 cm; 122 keV; 40 keV; 662 keV; CsI:Tl; crystal geometry; energy resolution; energy threshold; gamma-ray detectors; optical coupling; preparation; Energy resolution; Gamma ray detection; Gamma ray detectors; Geometrical optics; Laboratories; Optical coupling; Photodiodes; Readout electronics; Solid scintillation detectors; Wrapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0884-0

Type

conf

DOI

10.1109/NSSMIC.1992.301130

Filename

301130