1.Vietnam Agency for Radiation and Nuclear Safety, 113 Tran Duy Hung, Hanoi 100000, Vietnam
2.Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh 700000, Vietnam
3.Faculty of Natural Sciences, Duy Tan University, 3 Quang Trung, Da Nang 550000, Vietnam
4.Institute for Nuclear Science and Technology, VINATOM, 179 Hoang Quoc Viet, Hanoi 100000, Vietnam
5.Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi 100000, Vietnam
6.Nuclear Research and Development Division, Thailand Institute of Nuclear Technology, Nakorn Nayok, Thailand
7.Faculty of Medicine and Public Health, HRH Princess Chulabhorn College of Medical Science, Chulabhorn Royal Academy, Bangkok, Thailand
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Tuan Khai Nguyen, Hoai-Nam Tran, Quynh Ngoc Nguyen, et al. Calibration of a neutron dose rate meter in various neutron standard fields. [J]. Nuclear Science and Techniques 31(6):60(2020)
Tuan Khai Nguyen, Hoai-Nam Tran, Quynh Ngoc Nguyen, et al. Calibration of a neutron dose rate meter in various neutron standard fields. [J]. Nuclear Science and Techniques 31(6):60(2020) DOI： 10.1007/s41365-020-00763-0.
This paper presents the calibration of a neutron dose rate meter and the evaluation of its calibration factors (CFs) in several neutron standard fields (i.e., two standard fields with bare sources of ,252,Cf and ,241,Am-Be, and five simulated workplace fields with ,241,Am-Be moderated sources). The calibration in standard fields with bare sources was conducted by following the recommendations of the ISO 8529 standard. The measured total neutron ambient dose equivalent rates, denoted as ,, were analyzed to obtain direct components, denoted as ,, using a reduced fitting method. The CF was then calculated as the ratio between the conventional true value of the neutron ambient dose equivalent rate in a free field, denoted as,, and the value of ,,. In contrast, in the simulated workplace neutron fields, the calibration of the neutron dose rate meter was conducted by following the ISO 12789 standard. The CF was calculated as the ratio between the values of ,, measured by a standard instrument (i.e., Bonner sphere spectrometer) and the neutron dose rate meter. The CF values were obtained in the range of 0.88–1.0. The standard uncertainties (,k, = 1) of the CFs were determined to be in the range of approximately 6.6–13.1%.
Neutron standard fieldsNeutron dose rate meterCalibration factor252Cf source241Am-Be source
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