Open AccessCdWO4-Boron FY 2000 Task 4 Completion Report
Author(s) -
Z Bell,
M. Moyer
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/775527
Subject(s) - photomultiplier , detector , crystal (programming language) , materials science , boron , scintillation , wafer , scintillator , silicon photomultiplier , optics , fabrication , optoelectronics , physics , nuclear physics , medicine , alternative medicine , pathology , computer science , programming language
The fabrication of boron-covered crystal scintillation detectors is described. Bulk boron-loaded epoxy material was cast and cut into 0.5 mm-thick wafers that were mounted on CdWO{sub 4} and CsI(Tl) crystals. The crystals were mounted on miniature photomultiplier tubes and gamma spectra were obtained with the detectors. The ability of these small detectors to produce spectra that can be analyzed to provide isotopic identification has been demonstrated. In addition, the detector can produce a signature indicating the presence of neutrons. The same miniature size of these detectors that makes them attractive for hand-held portable use, may be a limiting factor in their efficiency. The small size of the scintillation crystals makes them not as efficient as larger NaI(Tl) crystals simply by virtue of significantly decreased sensitive volume and surface area. It may be worthwhile to consider slightly larger crystals (approximately 15 mm cubic CdWO{sub 4}) mounted on rectangular photomultipliers in a detecting head connected to the electronics package by a signal cable