Evaluation of reflective separators for arrays of small crystals used with avalanche photodiodes

Author

Pepin, C.M. ; Lecomte, R. ; Krus, D. ; Perna, L. ; Novak, W.

Author_Institution

Sherbrooke Univ., Que., Canada

Volume

1

fYear

2000

fDate

2000

Firstpage

19146

Abstract

Thin, highly reflective, opaque separators are required for compact arrays of small discrete scintillation crystals used in conjunction with pixellated photodiode readouts in high-resolution imaging applications. Mechanical stability, individual detector performance, and cost are the main factors to be considered in the choice of a suitable separator. Five different types of reflective separators were tested with 4×4 arrays of BGO, LSO and CsI(Tl): white reflector paint, white epoxy, a composite separator made of metallized Mylar(C) coated with white paint, white plastic and Mylar(C)-Al. The light output and intrinsic resolution of individual crystals in the arrays were measured as a function of energy and the results were compared to simulation of light collection efficiency obtained with DETECT97

Keywords

avalanche photodiodes; position sensitive particle detectors; solid scintillation detectors; Bi₄Ge₃O₁₂; CsI:Tl; DETECT97; Lu₂SiO₅:Ce; avalanche photodiodes; intrinsic resolution; light collection efficiency; light output; opaque separators; pixellated photodiode readouts; reflective separators; scintillation crystals; small crystal arrays; white epoxy; Costs; Crystals; High-resolution imaging; Paints; Particle separators; Photodiodes; Pixel; Solid scintillation detectors; Stability; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2000 IEEE

Conference_Location

Lyon

ISSN

1082-3654

Print_ISBN

0-7803-6503-8

Type

conf

DOI

10.1109/NSSMIC.2000.949119

Filename

949119