NDLI: Scintillation light emission studies of LSO scintillators

Content Provider	IEEE Xplore Digital Library
Author	Saoudi, A. Pepin, C. Pepin, C. Houde, D. Lecomte, R.
Copyright Year	1999
Description	Author affiliation: Metabolic & Functional Imaging Center, Sherbrooke Univ., Que., Canada (Saoudi, A.)
Abstract	UV and /spl gamma/-ray excited luminescence and nuclear spectroscopy were used to study the relationship between the scintillation mechanisms of LSO and the spectroscopic characteristics obtained with PMT and APD readouts at room temperature. No correlation was found between scintillation decay time and light output. Like other investigators, we observed the existence of two distinct luminescence centers, Ce1 and Ce2, that mainly give rise to short (420 nm) and long (440 nm) emission wavelengths. Our measurements showed that different LSO crystals excited by /spl gamma/-rays have emission spectra with largely different shapes and maxima depending on the relative population and luminescence efficiency of these centers. It was also found that the poor energy resolution of LSO and YSO scintillators is well correlated with the coexistence of the two competing luminescence mechanisms. The prevalence of either Ce1 or Ce2 luminescence tends to reduce the variance of light emission and, thus, to improve energy resolution. Inversely, the coexistence of the two centers increases variance and degrades energy resolution.
Starting Page	534
Ending Page	537
File Size	333584
Page Count	4
File Format	PDF
ISBN	0780350219
ISSN	10823654
DOI	10.1109/NSSMIC.1998.775197
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-08
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Luminescence Energy resolution Photonic crystals Spectroscopy Chemicals Shape measurement Solid scintillation detectors Physics Nuclear medicine Temperature
Content Type	Text
Resource Type	Article

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