Correlation effect in activity measurement of 59Fe |
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| Affiliation: | 1. Korea Research Institute of Standards and Science, P.O. Box 102, Yusong, Taejon, 305-600, South Korea;2. Department of Physics, Mokwon University, 800 Doan-dong, Seo-ku, Taejon, 302-729, South Korea;1. Department of Physics, Faculty of Science, University of Tabuk, Tabuk, KSA, Saudi Arabia;2. Institute of Laser, Sudan University of Science and Technology (SUST), Sudan;3. Department of Radiotherapy, Vocational School of Health Services, Uskudar University, Istanbul, 34672, Turkey;4. Medical Radiation Research Center (USMERA), Uskudar University, Istanbul, 34672, Turkey;5. Department of Medical Imaging, Vocational School of Health Services, Uskudar University, İstanbul, 34672, Turkey;6. Department of Physics, Dr.BabasahebAmbedkarMarathwada University, Aurangabad, 431004, India;1. Department of Physics, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa;2. Department of Scientific Laboratories - Physics, Sudan University of Science and Technology, P.O Box 407, Khartoum, Sudan;1. Accelerators & Ion Sources Department, Basic Nuclear Science Division, Nuclear Research Center, Atomic Energy Authority, 13759, Cairo, Egypt;2. North Carolina State University, Department of Nuclear Engineering, Raleigh, NC, 27695-7909, USA;1. Faculty of Physics, Ho Chi Minh City University of Pedagogy, 280 An Duong Vuong Street, District 5, Ho Chi Minh City, Vietnam;2. Nuclear Technique Laboratory, VNUHCM-University of Science, Ho Chi Minh City, Vietnam;3. Faculty of Physics and Engineering Physics, VNUHCM-University of Science, Ho Chi Minh City, Vietnam;1. Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Correlation effects due to the cascade transition of gamma-rays with gates on the relevant peaks have been studied in activity measurement of 59Fe using the bi-dimensional coincidence counting method. Extrapolation curves were obtained at three gamma gates of 1099.2 keV, 1291.6 keV, and that covering both photo-peaks by a computer discrimination method. Of these extrapolation curves, only that obtained at (950–1350) keV gamma gate shows a linear variation, but those of two single gamma gates are not linearly varied in the high efficiency region. This non-linearity obtained at the gamma gate of 1099.2 keV photo-peak was caused by the correlation effects due to 1–3 coincidence relation via unobserved 192 keV gamma-ray transitions. |
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