@article{1de4336a2a1d41f6af1e7f438c05224b,
title = "Crystal growth and luminescence properties of organic crystal scintillators for α-rays detection",
abstract = "Scintillation and luminescence properties of a novel organic crystal scintillator, 1,4-bis(2-methylstyryl)benzene (bis-MSB), were measured and compared with those of the conventional trans-stilbene organic crystal scintillator. Although trans-stilbene has been used for beta or neutron detection, trans-stilbene cannot be applied at high temperature conditions due to a lower melting point (124 °C). Liquid scintillators or plastic scintillators also cannot be used at high temperature. Usually, bis-MSB has been used as dopant in liquid scintillators to obtain fast scintillation decay and high luminescence quantum yield, and its melting point is 181 °C higher than that of trans-stilbene. In this paper, we focused on bis-MSB in solid state. The bis-MSB and trans-stilbene crystals were grown by the self-seeding vertical Bridgman method using double quartz ampoules. The bis-MSB crystal had the fast decay time of ∼4.2 ns and the increased light yield of ∼12,000 ph/5.5 MeV(α), while trans-stilbene had the decay time of ∼8.5 ns and the light yield of ∼8500 ph/5.5 MeV(α). The photoluminescence quantum yield was almost constant up to 125 °C for bis-MSB and only up to 50 °C for trans-stilbene. We succeeded in obtaining the novel organic crystal scintillator which can operate even at higher temperature up to 125 °C.",
keywords = "Alpha-ray, Double crucible technique, Growth from melt, High temperature, Organic crystal, Scintillator",
author = "Shinnosuke Yamato and Akihiro Yamaji and Shunsuke Kurosawa and Masao Yoshino and Yuji Ohashi and Kei Kamada and Yuui Yokota and Akira Yoshikawa",
note = "Funding Information: This work is partially supported by (1)Japan Society for the Promotion of Science KAKENHI, Grant Number 14462961(26420673), 15597934(15K13478), 15619740(15K18209), (17H05190), 16818695(16H06633), 17J03074 (by Grant-in-Aid for Young Scientists(B), etc. S. Kurosawa, A. Yamaji, T. Horiai), (2)Leading Initiative for Excellent Young Researchers(LEADER), MeXT, Grant Number 16809648, (3)Bilateral AS CR-JSPS Joint Research Project, (4)Japan Agency for Medical Research and Development, Medical Research and Development Programs Focused on Technology Transfers: Development of Advanced Measurement and Analysis Systems (AMED-SENTAN), Grant Number J170001559(26000354), (5)Japan Science and Technology Agency, Competitive Funding Programs A-STEP, Grant Number AS272I010c(15667421)and (6)Foundation for Promotion of Material Science and Technology of Japan. In addition, we would like to thank following persons for their support: Mr. Hiroshi Uemura, Ms. Keiko Toguchi, Ms. Megumi Sasaki Ms. Kuniko Kawaguchi and Ms. Maki Ohno of IMR, Tohoku University. Funding Information: This work is partially supported by (1) Japan Society for the Promotion of Science KAKENHI, Grant Number 14462961(26420673) , 15597934(15K13478) , 15619740(15K18209) , ( 17H05190 ), 16818695(16H06633) , 17J03074 (by Grant-in-Aid for Young Scientists(B), etc., S. Kurosawa, A. Yamaji, T. Horiai), (2) Leading Initiative for Excellent Young Researchers(LEADER) , MeXT, Grant Number 16809648 , (3) Bilateral AS CR-JSPS Joint Research Project, (4) Japan Agency for Medical Research and Development , Medical Research and Development Programs Focused on Technology Transfers : Development of Advanced Measurement and Analysis Systems (AMED-SENTAN), Grant Number J170001559(26000354) , (5) Japan Science and Technology Agency , Competitive Funding Programs A-STEP , Grant Number AS272I010c(15667421) and (6) Foundation for Promotion of Material Science and Technology of Japan . In addition, we would like to thank following persons for their support: Mr. Hiroshi Uemura, Ms. Keiko Toguchi, Ms. Megumi Sasaki Ms. Kuniko Kawaguchi and Ms. Maki Ohno of IMR, Tohoku University. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",
year = "2019",
month = aug,
doi = "10.1016/j.optmat.2019.04.051",
language = "English",
volume = "94",
pages = "58--63",
journal = "Optical Materials",
issn = "0925-3467",
publisher = "Elsevier",
}