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Dependence of the energy resolution of a scintillating crystal on the readout integration time

Bocci, V. and Chao, D. and Chiodi, G. and Faccini, R. and Ferroni, F. and Lunadei, R. and Martellotti, G. and Penso, G. and Pinci, D. and Recchia, L. (2012) Dependence of the energy resolution of a scintillating crystal on the readout integration time. Journal of Instrumentation, 7 (9). Art. No. P09014. ISSN 1748-0221. https://resolver.caltech.edu/CaltechAUTHORS:20130115-105921501

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Abstract

The possibilty of performing high-rate calorimetry with a slow scintillating crystal is studied. In this experimental situation, to avoid pulse pile-up, it can be necessary to base the energy measurement on only a fraction of the emitted light, thus spoiling the energy resolution. This effect was experimentally studied with a BGO crystal and a photomultiplier followed by an integrator, by measuring the maximum amplitude of the signals. The experimental data show that the energy resolution is exclusively due to the statistical fluctuations of the number of photoelectrons contributing to the maximum amplitude. When such number is small its fluctuations are even smaller than those predicted by Poisson statistics. These results were confirmed by a Monte Carlo simulation which allows to estimate, in a general case, the energy resolution, given the total number of photoelectrons, the scintillation time and the integration time.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/1748-0221/7/09/P09014DOIArticle
http://iopscience.iop.org/1748-0221/7/09/P09014/PublisherArticle
http://arxiv.org/abs/1207.4902arXivDiscussion Paper
Additional Information:© 2012 Institute of Physics. Received: July 23, 2012. Accepted: September 4, 2012. Published: September 24, 2012.
Subject Keywords:Gamma detectors (scintillators, CZT, HPG, HgI etc); Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators); Calorimeters
Issue or Number:9
Classification Code:PACS: 29.40.Mc, 85.60.Ha, 29.40.Vj, 07.50.Qx
Record Number:CaltechAUTHORS:20130115-105921501
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130115-105921501
Official Citation:Dependence of the energy resolution of a scintillating crystal on the readout integration time V Bocci et al 2012 JINST 7 P09014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36388
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:15 Jan 2013 21:09
Last Modified:03 Oct 2019 04:37

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