Radiation Hardness of 30 cm Long CsI(Tl) Crystals

Sumitted to PubDB: 2016-10-19

Category: Technical Paper, Visibility: Public

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Authors	Savino Longo, John Roney
Date	Aug. 23, 2016
Belle II Number	BELLE2-PUB-TE-2016-001
Abstract	Measurements of the degradation in performance of 30 cm long CsI(Tl) scintillation crystals exposed to 1 MeV photon doses of 2, 10, 35, 100 and 1000 Gy are presented. The light yield, light yield longitudinal non-uniformity, scintillation decay times, energy resolution and timing resolution of a set of spare crystals from the BABAR and Belle experiments are studied as a function of these doses. In addition, a model that describes the plateau observed in the light output loss as a function of dose in terms of increase in concentrations of absorption centres with irradiation is presented.