NDLI: GdI3:Ce - A New Gamma and Neutron Scintillator

Content Provider	IEEE Xplore Digital Library
Author	Glodo, J. Higgins, W.M. van Loef, E.V.D. Shah, K.S.
Copyright Year	2006
Description	Author affiliation: Radiat. Monitoring Devices, Watertown, MA (Glodo, J.; Higgins, W.M.; van Loef, E.V.D.; Shah, K.S.)
Abstract	In this paper we present our initial results on $GdI_{3}:Ce$ scintillator for gamma and neutron detection. We grew crystals of this material 10 mm diameter and over 20 mm long. The crystal has a layered structure. Like other halide materials it is hygroscopic. Only small samples, few millimeters in size, were tested. The emission under X-ray excitation is green and shows a broad band in the range of 450 to 750 nm with the maximum at ~550 nm. The emission is due to d-f transitions on $Ce^{3+}$ ions. The scintillation under gamma excitation is fast and decays with the 39 ns time constant (major component). The rise time of scintillation is also fast at about 0.5 ns. The light output of the investigated samples was as high as ~58,000 photons/MeV. The energy resolution at 662 keV was measured to be 8.7% and should improve with the better crystal quality. The crystals were also tested for the detection of thermal neutrons from a moderated $^{252}Cf$ source. The neutron peak appears at 86 keV when compared to 60 keV peak in $^{241}Am$ spectrum taken under the same conditions. The light output per single detected neutron is about ~5000 photons.
Starting Page	1574
Ending Page	1577
File Size	267575
Page Count	4
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.354199
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Neutrons Crystalline materials Testing Photonic crystals Solid scintillation detectors Photomultipliers Radiation monitoring Nuclear and plasma sciences Gamma ray detection Gamma ray detectors
Content Type	Text
Resource Type	Article

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