Fabrication and scintillation properties of a flexible optical-guiding crystal scintillator
Ryuga Yajima, Kei Kamada, Rikito Murakami, Naoko Kutsuzawa, Rei Sasaki, Masao Yoshino, Takahiko Horiai, Kyoung Jin Kim, Vladimir V. Kochurikhin, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada, Akira Yoshikawa
Abstract
Abstract Scintillation properties of a flexible optical-guiding crystal scintillator with a thallium-doped CsI (Tl:CsI) crystal and borosilicate glass as the core and cladding, respectively, are reported. The as-fabricated optical-guiding crystal scintillator exhibits a light yield of 31,000 photons MeV −1 under 662 keV γ -ray irradiation. The recrystallized sample is transparent and provides a higher light yield of 54,000 photons MeV –1 , which is comparable to that of single-crystal Tl:CsI. The decay times are 400 ns (28%) and 1,350 ns (72%). This material can serve as a scintillator fiber with high sensitivity to γ - and X-rays, high light yield, and energy discrimination.