Crystal Growth and Scintillation Properties of Carbazole for Neutron Detection

Akihiro Yamaji; Shinnosuke Yamato; Shunsuke Kurosawa; Masao Yoshino; Satoshi Toyoda; Kei Kamada; Yuui Yokota; Hiroki Sato; Yuji Ohashi; Akira Yoshikawa

doi:10.1109/TNS.2020.2996276

Crystal Growth and Scintillation Properties of Carbazole for Neutron Detection

Akihiro Yamaji, Shinnosuke Yamato, Shunsuke Kurosawa, Masao Yoshino, Satoshi Toyoda, Kei Kamada, Yuui Yokota, Hiroki Sato, Yuji Ohashi, Akira Yoshikawa

Tohoku University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo-and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 ± 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.

Original language	English
Article number	9097916
Pages (from-to)	1027-1031
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	67
Issue number	6
DOIs	https://doi.org/10.1109/TNS.2020.2996276
Publication status	Published - 2020 Jun

Keywords

Crystal growth
neutron detectors
organic scintillators

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10.1109/TNS.2020.2996276

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title = "Crystal Growth and Scintillation Properties of Carbazole for Neutron Detection",

abstract = "Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo-and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 ± 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.",

keywords = "Crystal growth, neutron detectors, organic scintillators",

author = "Akihiro Yamaji and Shinnosuke Yamato and Shunsuke Kurosawa and Masao Yoshino and Satoshi Toyoda and Kei Kamada and Yuui Yokota and Hiroki Sato and Yuji Ohashi and Akira Yoshikawa",

note = "Funding Information: Manuscript received February 8, 2020; revised March 30, 2020; accepted April 28, 2020. Date of publication May 21, 2020; date of current version June 19, 2020. This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI under Grant 18K14135, in part by Japan Science and Technology Agency (JST), through the Competitive Funding Programs A-STEP (Adaptable & Seamless Technology Transfer Program through Target-Driven Research and Development), under Grant JPMJTS1521, and in part by the Iketani Science and Technology Foundation. Publisher Copyright: {\textcopyright} 1963-2012 IEEE.",

year = "2020",

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language = "English",

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AU - Yamaji, Akihiro

AU - Yamato, Shinnosuke

AU - Kurosawa, Shunsuke

AU - Yoshino, Masao

AU - Toyoda, Satoshi

AU - Kamada, Kei

AU - Yokota, Yuui

AU - Sato, Hiroki

AU - Ohashi, Yuji

AU - Yoshikawa, Akira

N1 - Funding Information: Manuscript received February 8, 2020; revised March 30, 2020; accepted April 28, 2020. Date of publication May 21, 2020; date of current version June 19, 2020. This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI under Grant 18K14135, in part by Japan Science and Technology Agency (JST), through the Competitive Funding Programs A-STEP (Adaptable & Seamless Technology Transfer Program through Target-Driven Research and Development), under Grant JPMJTS1521, and in part by the Iketani Science and Technology Foundation. Publisher Copyright: © 1963-2012 IEEE.

PY - 2020/6

Y1 - 2020/6

N2 - Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo-and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 ± 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.

AB - Carbazole crystals were grown using self-seeding vertical Bridgman technique, and the scintillation properties for neutron detection were investigated. Results of powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated the single phase of the grown carbazole crystal with orthorhombic structure. Photo-and radio-luminescence measurements were carried out, and maxima of both emission peaks were at 420 nm. The light yield under 5.5-MeV alpha-ray irradiation was estimated to be 1.87 times higher than that of lithium glass GS-20. The scintillation decay time under neutron irradiation was estimated to be 11.4 ± 0.3 ns. It follows from the temperature dependence measurements that the light output under 662-keV gamma-ray excitation decreases with increasing temperature.

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KW - organic scintillators

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Crystal Growth and Scintillation Properties of Carbazole for Neutron Detection

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