Magnetic quenching of positronium in organic solutions |
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| Institution: | 1. Department of Chemical Engineering, Faculty of Engineering, Yalova University, Merkez, Yalova 77200, Turkey;2. Ford Otosan Ihsaniye Automotive Vocational School, Kocaeli University, Golcuk, Kocaeli 41680, Turkey;3. Department of Physics, Faculty of Science, Marmara University, Kadikoy, Istanbul 34722, Turkey;1. The Oarai Center, Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan;2. Tokyo City University, Setagaya, Tokyo 158-8557, Japan;3. Renesas Electronics Corporation, Hitachinaka, Ibaraki 312-8504, Japan;1. Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305–8568, Japan;1. Neutron Technologies Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;2. Chemical Sciences Division, Physical Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;2. Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences, Shanghai 201800, China;1. Research Center of Advanced Catalytic Materials & Functional Molecular Synthesis, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing, 312000, China;2. Institute of High Energy Physics, The Chinese Academy of Science, Beijing, 100049, China |
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| Abstract: | The magnetic quenching of ortho-positronium (o-Ps) in some pure nonpolar liquids (n-hexane, cyclohexane and benzene) and solutions (nitrobenzene in n-hexane, cyclohexane and benzene; and carbon tetrachloride and biphenyl in n-hexane) is examined for steady magnetic fields up to 14 kG by the positron annihilation lifetime technique. The long lifetime of o-Ps is very sensitive to the strength of the external magnetic field, decreasing as the field strength increases. This effect follows from a well-known principle of atomic physics, the quadratic Zeeman effect. With one exception, all the liquids studied here appear to be normal in this regard. The exception is nitrobenzene in n-hexane, which shows a very marked enhancement of quenching beyond the Zeeman effect at low fields. |
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