중성자선과 감마선 동시측정이 가능한 휴대용 계측시스템 개발에 관한 연구

• Published in: 방사선기술과학 Vol. 43; no. 6; pp. 481 - 487
• Main Authors: 김희경(Hui-Gyeong Kim), 홍용호(Yong-Ho Hong), 정영석(Young-Seok Jung), 김재현(Jae-Hyun Kim), 박수연(Sooyeun Park)
• Format: Journal Article
• Language: Korean
• Published: 대한방사선과학회(구 대한방사선기술학회) 31.12.2020; KOREAN SOCIETY OF RADIOLOGICAL TECHNOLOGY; 대한방사선과학회
• Subjects: 방사선과학; 동시측정; 방사선 계측; CZT 센서; CZT sensors; Simultaneous measurements; 핵비확산; Prompt gamma; Nuclear nonproliferation; 즉발감마선; Detection; CZT
• ISSN: 2288-3509; 2384-1168

Radiation measurement technology has steadily improved and its usage is expanding in various industries such as nuclear medicine, security search, satellite, nondestructive testing, environmental industries and the domain of nuclear power plants (NPPs). Especially, the simultaneous measurements of gamma rays and neutrons can be even more critical for nuclear safety management of spent nuclear fuel and monitoring of the nuclear material. A semiconductor detector comprising cadmium, zinc, and tellurium (CZT) enables to detect gamma-rays due to the significant atomic weight of the elements via immediate neutron and gamma-ray detection. Semiconductor sensors might be used for nuclear safety management by monitoring nuclear materials and spent nuclear fuel with high spatial resolution as well as providing real-time measurements. We aim to introduce a portable nuclide-analysis device that enables the simultaneous measurements of neutrons and gamma rays using a CZT sensor. The detector has a high density and wide energy band gap, and thus exhibits highly sensitive physical characteristics and characteristics are required for performing neutron and gamma-ray detection. Portable nuclide-analysis device is used on NPP-decommissioning sites or the purpose of nuclear nonproliferation, it will rapidly detect the nuclear material and provide radioactive-material information. Eventually, portable nuclide-analysis device can reduce measurement time and economic costs by providing a basis for rational decision making.