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

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

Optical Materials: X (Aug 2022)

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

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

Affiliations

Yui Takizawa: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan; Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan; Corresponding author. Tohoku University, New Industry Creation Hatchery Center, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
Kei Kamada: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan; New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan; C&A Corporation, 1-16-23, Ichiban-cho, Aoba-ku, Sendai, Miyagi, 980-0811, Japan
Masao Yoshino: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Kyoung Jin Kim: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Naoko Kutsuzawa: C&A Corporation, 1-16-23, Ichiban-cho, Aoba-ku, Sendai, Miyagi, 980-0811, Japan
Akihiro Yamaji: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Shunsuke Kurosawa: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Yuui Yokota: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Hiroki Sato: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Satoshi Toyoda: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Yuji Ohashi: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
Takashi Hanada: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Vladimir Kochurikhin: C&A Corporation, 1-16-23, Ichiban-cho, Aoba-ku, Sendai, Miyagi, 980-0811, Japan
Akira Yoshikawa: Institute for Material Research, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi, 980-8577, Japan; New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan; C&A Corporation, 1-16-23, Ichiban-cho, Aoba-ku, Sendai, Miyagi, 980-0811, Japan

Journal volume & issue: Vol. 15
p. 100159

Abstract

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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.

Published in Optical Materials: X

ISSN: 2590-1478 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: https://www.journals.elsevier.com/optical-materials-x

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