Analysis of the 222Rn concentration in argon and a purification technique for gaseous and liquid argon |
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| Affiliation: | 1. University of Novi Sad, Faculty of Sciences, Trg Dositeja Obradovica 4, 21000 Novi Sad, Serbia;2. University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia;1. School of Nuclear Science and Technology, University of South China, 28 Changshengxi Rd, Hengyang, 421001, Hunan, China;2. Radiological Health Engineering Laboratory, Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Blvd, Ann Arbor, MI, 48109-2104, USA;3. Department of Materials Science and Engineering, College of Engineering, University of Michigan, 2300 Hayward St, Ann Arbor, MI, 48109-2136, USA;1. School of Physics and Astronomy, Shanghai Jiao Tong University, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai 200240, China;2. School of Physics, Beihang University, Beijing 102206, China;3. Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing, 102206, China;4. School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan 450001, China;5. State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China;6. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;7. School of Physics, Peking University, Beijing 100871, China;8. Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China;9. Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, Shandong, China;10. Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education, Shandong University, Qingdao 266237, Shandong, China;11. Department of Physics, University of Maryland, College Park, MD 20742, USA;12. Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China;13. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;14. School of Physics, Sun Yat-Sen University, Guangzhou 510275, China;15. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, 519082, China;p. School of Physics, Nankai University, Tianjin 300071, China;q. Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China;r. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;s. Shanghai Jiao Tong University Sichuan Research Institute, Chengdu 610213, China;t. SJTU Paris Elite Institute of Technology, Shanghai Jiao Tong University, Shanghai, 200240, China;1. National Institute of Radiological Sciences, Japan;2. Chiba University, Japan;3. Tokyo Institute of Technology, Japan;1. Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109-1040, USA;2. Department of Physics, University of Maryland, College Park, MD 20742-4111, USA |
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| Abstract: | We present an investigation of the 222Rn concentration in argon with ultra-low background proportional counters. Argon purification tests by means of cryo-adsorption of radon on activated carbon were performed. For gaseous argon the purification process was found to be very efficient. Also in liquid phase the 222Rn concentration could be reduced significantly, however, the efficiency is lower than in the gas phase. We also have analyzed the initial 222Rn concentrations in commercial liquid argon. It was found to be significantly higher than in liquid nitrogen. |
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