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Negative pion transfer process in a hydrogen-containing gas mixture |
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| Authors: | T Muroyama A Shinohara T Saito A Yokoyama K Takamiya S Morimoto K Nakanishi H Baba T Miura Y Hamajima T Kaneko H Muramatsu S Kojima M Furukawa |
| Institution: | (1) Low Level Radioactivity Laboratory, Kanazawa University, Tatsunokuchi, nobi-gun, 923-12 Ishikawa, Japan;(2) Graduate School of Science, Nagoya University, Chikusa-ku, 464-01 Nagoya, Japan;(3) Graduate School of Science, Osaka University, Toyonaka, 560 Osaka, Japan;(4) Radiation Science Center, High Energy Accelerator Research Organization, Tsukuba, 305 Ibaraki, Japan;(5) Faculty of Science, Kanazawa University, Kanazawa, 920-11 Ishikawa, Japan;(6) Faculty of Science, Niigata University, 950-21 Igarashi, Niigata, Japan;(7) Faculty of Education, Shinshu University, Nishi-nagano, 380 Nagano, Japan;(8) Radiation Research Center, Aichi Medical University, Aichi-gun, 480-11 Aichi, Japan;(9) Faculty of Environmental and Information Sciences, Yokkaichi University, Yokkaichi, 512 Mie, Japan |
| Abstract: | Annihilation γ-rays of π0 and pionic X-rays were measured in the gas mixtures of H2+Z and CH4+Z systems (Z=He, Ne, Ar and Kr). Pion capture probability of hydrogen atom was obtained from the annihilation γ-ray counts and the capture probability of Z atom was obtained from the pionic X-ray intensities. Transfer rates were determined from the data based on a combined large mesomolecular model. The transfer rates obtained were smaller than the systematics of the Russian group. Difference in the transfer rate between the gas and the liquid phases was found by a comparison of the present results with our previous ones. |
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