Development of an efficient method of radiation characteristic analysis using a portable simultaneous measurement system for neutron and gamma-ray

Dong-Sik Jin; Yong-Ho Hong; Hui-Gyeong Kim; Sang-Soo Kwak; Jae-Geun Lee; Young-Suk Jung

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자료유형: 학술저널

저자정보: Dong-Sik Jin (Nuclear Environment Technology) Yong-Ho Hong (Nuclear Environment Technology) Hui-Gyeong Kim (Nuclear Environment Technology) Sang-Soo Kwak (Nuclear Environment Technology) Jae-Geun Lee (Nuclear Environment Technology) Young-Suk Jung (Nuclear Environment Technology)

저널정보: 한국분석과학회 분석과학 분석과학 제35권 제2호

발행연도: 2022.4

수록면: 69 - 81 (13page)

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The method of measuring and classifying the energy category of neutrons directly using raw data acquired through a CZT detector is not satisfactory, in terms of accuracy and efficiency, because of its poor energy resolution and low measurement efficiency. Moreover, this method of measuring and analyzing the characteristics of low-energy or low-activity gamma-ray sources might be not accurate and efficient in the case of neutrons because of various factors, such as the noise of the CZT detector itself and the influence of environmental radiation. We have therefore developed an efficient method of analyzing radiation characteristics using a neutron and gamma-ray analysis algorithm for the rapid and clear identification of the type, energy, and radioactivity of gamma-ray sources as well as the detection and classification of the energy category (fast or thermal neutrons) of neutron sources, employing raw data acquired through a CZT detector. The neutron analysis algorithm is based on the fact that in the energy-spectrum channel of 558.6 keV emitted in the nuclear reaction 113Cd + 1n → 114Cd + in the CZT detector, there is a notable difference in detection information between a CZT detector without a PE modulator and a CZT detector with a PE modulator, but there is no significant difference between the two detectors in other energy-spectrum channels. In addition, the gamma-ray analysis algorithm uses the difference in the detection information of the CZT detector between the unique characteristic energy-spectrum channel of a gamma-ray source and other channels. This efficient method of analyzing radiation characteristics is expected to be useful for the rapid radiation detection and accurate information collection on radiation sources, which are required to minimize radiation damage and manage accidents in national disaster situations, such as large-scale radioactivity leak accidents at nuclear power plants or nuclear material handling facilities.

#CZT (Cadmium Zinc Telluride, CdZnTe) detector #radiation characteristic analysis #gamma-ray #fast neutron #thermal neutron #characteristic energy

참고문헌 (23)

참고문헌 신청

H. G. Kim, Y. H. Hong, Y. S. Jung, Y. H. Kim and S. Y. Park, J. Radiol. Sci. Technol., 43(6), 481-487 (2020).

B. Franco, L. L. Gerald and W. Peter, ‘Encyclopedia of Condensed Matter Physics’, 1st Ed., Elsevier, Amsterdam, 2005.

L. Heilbronn, ‘Neutron Properties and Definitions’, NASA, Washington, 2015.

R. G. Miller and R. W. Kavanagh, Nucl. Instrum. Methods, 48, 13-27 (1967).

A. Omar, S. Burdin, G. Casse, H. V. Zalinge, S. Powel, J. Rees and et al., Radiat. Meas., 122, 121-125 (2019).

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