Radiation-detection methods to counter radiological threats

. We propose two methods as means to counter radiological terrorist acts, such as dirty-bomb or silent-source attacks. The first proposal concerns a nuclear detection system using the security cameras already installed in public spaces. We describe a method to estimate radiation dose from the amount...

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Bibliographic Details
Published in:European physical journal plus 2018-07, Vol.133 (7), p.266, Article 266
Main Authors: Tsuchiya, Ken’ichi, Kurosawa, Kenji, Akiba, Norimitsu, Kakuda, Hidetoshi, Imoto, Daisuke, Hirabayashi, Manato, Kuroki, Kenro
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Cameras
Complex Systems
Condensed Matter Physics
Emergency response
Fibers
Focus Point on New Technologies Related to Intentional and Accidental Release of CBRNe Agents
Gamma rays
Irradiation
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Position sensing
Radiation
Radiation dosage
Radiation effects
Regular Article
Scintillating fibers
Theoretical
Warning systems
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Summary:. We propose two methods as means to counter radiological terrorist acts, such as dirty-bomb or silent-source attacks. The first proposal concerns a nuclear detection system using the security cameras already installed in public spaces. We describe a method to estimate radiation dose from the amount of noise in CCD images caused by neutron radiation. Several dosimeters subjected to neutron and gamma-ray irradiation (0.1mSv-1000mSv) were imaged by a CCD video camera. We confirmed that the amount of noise in the CCD images varied linearly with radiation exposure. We propose a warning system to uncover shielded nuclear materials or radiation exposure devices. The second proposal is a survey system of radiological residue using long scintillation fibers. After a dirty-bomb explosion, the first responders need to search for radiological samples for subsequent nuclear forensics. We developed a position-sensitive detector with 10m plastic scintillation fibers. The position resolution was found to be 50cm and the dynamic range extended from 0.05μ Sv/h to 300μSv/h. We also were able to perform real-time measurements of distributed sources in situ . Stand-off detection using this device helps in surveying contaminated areas.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2018-12146-3