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Published 2012 | Published
Journal Article Open

Quality of Long LSO/LYSO Crystals

Abstract

Because of their high stopping power (X_0 = 1.14 cm) and fast (t = 40 ns) and bright (4 times of BGO) scintillation cerium doped silicate based heavy crystal scintillators (LSO and LYSO) have attracted a broad interest in the high energy physics community pursuing precision electromagnetic calorimeter for future high energy physics experiments. Their excellent radiation hardness against γ-rays, neutrons and charged hadrons also makes them a preferred material for calorimeters to be operated in a severe radiation environment, such as the HL-LHC. The optical and scintillation properties and its radiation hardness against γ-ray irradiations up to 1 Mrad are presented for the first 2.5 × 2.5 × 28 cm LYSO sample. An absorption band was found at the seed end of this sample and three other long samples, which was traced back to a bad seed crystal used in the corresponding crystal growth process. Significant progresses in optical and scintillation properties were achieved for large size LYSO crystals after eliminating this absorption band. Their application in future HEP experiments at HL-LHC are discussed.

Additional Information

© 2013 Published under licence by IOP Publishing Ltd. This work is partially supported by the U.S. Department of Energy Grant No. DE-FG03-92- ER40701 and the U.S. National Science Foundation Award PHY-0612805 and PHY-0516857.

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Created:
September 14, 2023
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October 23, 2023