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Emission Spectra of LSO and LYSO Crystals Excited by UV Light, X-Ray and γ-ray

Mao, Rihua and Zhang, Liyuan and Zhu, Ren-Yuan (2008) Emission Spectra of LSO and LYSO Crystals Excited by UV Light, X-Ray and γ-ray. IEEE Transactions on Nuclear Science, 55 (3, par). pp. 1759-1766. ISSN 0018-9499. doi:10.1109/TNS.2008.921877.

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Because of their high stopping power (X_o = 1.14 cm, R_(Moliere) = 2.07 cm) and fast (~ 40 ns) bright (4 times of BGO) scintillation, cerium doped lutetium oxyorthosilicate (LSO) and cerium doped lutetium-yttrium oxyorthosilicate (LYSO) crystals have attracted a broad interest in the high energy physics community. This paper presents a comparative study on emission spectra measured for large size BGO, lead tungstate (PbWO_4), LSO and LYSO samples excited by UV light (photo-luminescence) with and without internal absorption, X-ray (X-luminescence) and gamma-ray (radio-luminescence). A red shift was observed between the emission spectra with internal absorption as compared to that without. An additional red shift and a significant red component were observed in the radio-luminescence spectra measured for LSO samples but not LYSO samples, which were disappeared after a gamma-ray irradiation with an accumulated dose of 5 x 10^3 rad. This is the only significant difference observed between the large size LSO and LYSO samples. The origin of these red shifts and the consequence to their light output and applications in the high energy and nuclear physics experiments are discussed.

Item Type:Article
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Zhang, Liyuan0000-0002-0898-787X
Zhu, Ren-Yuan0000-0003-3091-7461
Additional Information:© Copyright 2008 IEEE. Reprinted with permission. Manuscript received January 11, 2008; revised March 10, 2008. [Date Published in Issue: 2008-06-17] This work was supported in part by the U.S. Department of Energy under Grant DE-FG03-92-ER-40701 and in part by the U.S. National Science Foundation Awards PHY-0612805 and PHY-0516857. The authors would like to thank Dr. C. Melcher for providing three LSO samples and thank Shanghai Institute of Ceramics for providing the BGO and PbWO samples used in this study.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:Crystal, lutetium oxyorthosilicate, lutetium yttrium oxyorthosilicate, photo-luminescence, radio-luminescence, scintillator, X-luminescence
Issue or Number:3, par
Record Number:CaltechAUTHORS:MAOieeetns08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11110
Deposited By: Archive Administrator
Deposited On:15 Jul 2008 19:00
Last Modified:08 Nov 2021 21:33

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