Growth of thallium-doped CsI/CsCl/KCl eutectics and their scintillation properties

Growth of thallium-doped CsI/CsCl/KCl eutectics and their scintillation properties

In this study, Tl:CsI/CsCl/KCl ternary eutectic scintillators were grown using the vertical Bridgman–Stockbarger method by unidirectional solidification. The CsI and KCl phases were elongated along the growth direction, based on backscattered electron imaging (BEI) observations. The Tl:CsI scintilla...

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Bibliographic Details
Main Authors: Yui Takizawa, Kei Kamada, Masao Yoshino, Kyoung Jin Kim, Naoko Kutsuzawa, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada, Vladimir Kochurikhin, Akira Yoshikawa
Format: Article
Language:English
Published: Elsevier 2022-08-01
Series:Optical Materials: X
Subjects:
A1:Eutectics
A2:Bridgman technique
B1:Halides
B2:Scintillator materials
B3:Scintillators
Online Access:http://www.sciencedirect.com/science/article/pii/S2590147822000249
Description
Summary:In this study, Tl:CsI/CsCl/KCl ternary eutectic scintillators were grown using the vertical Bridgman–Stockbarger method by unidirectional solidification. The CsI and KCl phases were elongated along the growth direction, based on backscattered electron imaging (BEI) observations. The Tl:CsI scintillator phase grew as a matrix, which can be used to create optical waveguides for scintillation light. The expected Tl+ emission peak was observed at 550 nm under X-ray excitation. This emission was attributed to the self-trapped excitons perturbed by TI+ in Tl:CsI. The decay time of the Tl:CsI/CsCl/KCl eutectic was 285 ns, and its light output was estimated to be 10,800 photons/MeV.
ISSN:2590-1478

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