Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields
The 3He proportional chamber is widely used for neutron measurement owing to its high neutron detection efficiency and simplicity for gamma-ray rejection. In general, the neutron and gamma-ray signals obtained from the 3He proportional chamber can be easily separated by the difference in the pulse h...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-02-01
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| Series: | Nuclear Engineering and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573318301050 |
| _version_ | 1828490420577894400 |
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| author | Joonbum Choi Junesic Park Jaebum Son Yong Kyun Kim |
| author_facet | Joonbum Choi Junesic Park Jaebum Son Yong Kyun Kim |
| author_sort | Joonbum Choi |
| collection | DOAJ |
| description | The 3He proportional chamber is widely used for neutron measurement owing to its high neutron detection efficiency and simplicity for gamma-ray rejection. In general, the neutron and gamma-ray signals obtained from the 3He proportional chamber can be easily separated by the difference in the pulse heights. However, for a high gamma-ray field, the gamma-ray signal cannot be precisely eliminated by the pulse height due to gamma-ray pulse pileup which causes the pulse height of gamma-ray pulse to increase and making the pulses due to neutrons and gamma rays indistinguishable. In this study, an improved algorithm for n/γ discrimination using a parameter, which is the ratio of the rise time to the pulse height, is proposed. The n/γ discrimination performance of the algorithm is evaluated by applying it to 252Cf neutron signal separation from various gamma-ray exposure rate levels ranging 0.1–5 R/h. The performance is compared to that of the conventional pulse-height analysis method in terms of the gamma elimination ratio. The suggested algorithm shows better performance than the conventional one by 1.7% (at 0.1 R/h) to 70% (at 5 R/h) for gamma elimination. Keywords: 3He proportional chamber, Neutron detector, n/γ discrimination, Algorithm, High gamma-ray field |
| first_indexed | 2024-12-11T10:44:27Z |
| format | Article |
| id | doaj.art-0a532b025d78483da001e6f0647911b1 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-11T10:44:27Z |
| publishDate | 2019-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-0a532b025d78483da001e6f0647911b12022-12-22T01:10:31ZengElsevierNuclear Engineering and Technology1738-57332019-02-01511263268Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fieldsJoonbum Choi0Junesic Park1Jaebum Son2Yong Kyun Kim3Department of Nuclear Engineering, Hanyang University, Seoul, South KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul, South KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul, South KoreaCorresponding author. Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, South Korea.; Department of Nuclear Engineering, Hanyang University, Seoul, South KoreaThe 3He proportional chamber is widely used for neutron measurement owing to its high neutron detection efficiency and simplicity for gamma-ray rejection. In general, the neutron and gamma-ray signals obtained from the 3He proportional chamber can be easily separated by the difference in the pulse heights. However, for a high gamma-ray field, the gamma-ray signal cannot be precisely eliminated by the pulse height due to gamma-ray pulse pileup which causes the pulse height of gamma-ray pulse to increase and making the pulses due to neutrons and gamma rays indistinguishable. In this study, an improved algorithm for n/γ discrimination using a parameter, which is the ratio of the rise time to the pulse height, is proposed. The n/γ discrimination performance of the algorithm is evaluated by applying it to 252Cf neutron signal separation from various gamma-ray exposure rate levels ranging 0.1–5 R/h. The performance is compared to that of the conventional pulse-height analysis method in terms of the gamma elimination ratio. The suggested algorithm shows better performance than the conventional one by 1.7% (at 0.1 R/h) to 70% (at 5 R/h) for gamma elimination. Keywords: 3He proportional chamber, Neutron detector, n/γ discrimination, Algorithm, High gamma-ray fieldhttp://www.sciencedirect.com/science/article/pii/S1738573318301050 |
| spellingShingle | Joonbum Choi Junesic Park Jaebum Son Yong Kyun Kim Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields Nuclear Engineering and Technology |
| title | Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields |
| title_full | Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields |
| title_fullStr | Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields |
| title_full_unstemmed | Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields |
| title_short | Study of n/γ discrimination using 3He proportional chamber in high gamma-ray fields |
| title_sort | study of n γ discrimination using 3he proportional chamber in high gamma ray fields |
| url | http://www.sciencedirect.com/science/article/pii/S1738573318301050 |
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