Development of Optical-fiber-based Neutron Detector Using Li glass Scintillator for an Intense Neutron Field

被引：22

作者：

Ishikawa, Akihisa ^{[1
]}

Yamazaki, Atsushi ^{[1
]}

Watanabe, Kenichi ^{[1
]}

Yoshihashi, Sachiko ^{[1
]}

Uritani, Akira ^{[1
]}

Sakurai, Yoshinori ^{[2
]}

Tanaka, Hiroki ^{[2
]}

Ogawara, Ryo ^{[3
]}

Suda, Mitsuru ^{[3
]}

Hamano, Tsuyoshi ^{[3
]}

机构：

[1] Nagoya Univ, Dept Appl Energy Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan

[2] Kyoto Univ, Inst Integrated Radiat & Nucl Sci, 2 Asashiro Nishi, Kumatori, Osaka 5900494, Japan

[3] Natl Inst Quantum & Radiol Sci & Technol, Inge Ku, 4-9-1 Anagawa, Chiba, Chiba 2638555, Japan

来源：

SENSORS AND MATERIALS | 2020年 / 32卷 / 04期

关键词：

optical-fiber-based neutron detector; real-time measurement; Li glass; Eu:LiCaAlF6; LiF/Eu:CaF2;

D O I：

10.18494/SAM.2020.2748

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The development of a neutron detector for real-time measurements in an intense neutron field is desired. We are developing a quartz optical-fiber-based neutron detector as a real-time neutron monitor. Thus far, Eu:LiCaAlF6 crystals and LiF/Eu:CaF2 eutectics have been used as the scintillators of the quartz optical-fiber-based neutron detectors. These scintillators have high light yields, but relatively long decay time constants, which are the limiting factors for the dynamic range of optical-fiber-based neutron detectors. In this work, we applied a small Li glass scintillator to a quartz optical-fiber-based neutron detector using an optical fiber with high numerical aperture and a UV-curable resin with high transmittance. The fabricated detector showed a clear peak corresponding to neutron events in the pulse height distribution. The radiation resistance was evaluated and no deterioration was observed up to 2 x 10(12) n/cm(2). The detector output linearity was confirmed up to 450 kcps, which was about ten times larger than that of the detector using the conventional Eu:LiCaAlF6 or LiF/Eu:CaF2 scintillator.

引用

页码：1489 / 1495

页数：7

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