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Evaluation of gamma-ray responses of LuAG(Pr) scintillator coupled with APD

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5 Author(s)
Takayuki Yanagida ; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aobo-ku, Sendai, Miyagi, Japan ; Mitsuhiro Sato ; Kei Kamada ; Akira Yoshikawa
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Pr3+ doped Lu3AI5O12 crystalline scintillator is developed. By the gamma-ray irradiation, three different Pr3+ concentration, 0.1, 0.18, and 0.22 mol%, are compared in a view of light yield, energy resolution, and decay time. At the same time, a temperature dependence of these gamma-ray responses are also investigated. As a result, the 0.22 mol% sample shows the highest light yield, reaching more than three times as large as reference BGO scintillator, at +20 degrees of Celcius. A main component of the decay is ~ 21 ns for all the sample pieces. The temperature dependence of these sample pieces is low. Gamma-ray responses at +20 degrees of Celcius are almost the same level for these three pieces, but the temperature dependences are different with Pr3+ concentration.

Published in:

2007 IEEE Nuclear Science Symposium Conference Record  (Volume:2 )

Date of Conference:

Oct. 26 2007-Nov. 3 2007