2004 Fiscal Year Final Research Report Summary
Transport and Extraction of Radioactive Ions in Superfluid Helium
| Project/Area Number |
14540283
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Osaka Gakuin University |
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Principal Investigator |
TAKAHASHI Noriaki Osaka Gakuin University, Dept. of Distribution and Communication Sciences, Professor, 流通科学部, 教授 (10028152)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMODA Tadashi Osaka University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (70135656)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Superfluid Helium / Impurity Ions / Radiation Detection Method / Snowball / Nuclear Polarisation / Extraction of Positive Ions / Transport Phenomena / Potential Barrier |
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| Research Abstract |
Described here are experiments on the transport under electric field and the extraction of impurities from the surface of superfluid helium. As impurities we introduced radioactive heavy ions into helium. We established an experimental method of production, transport and extraction of ions in superfluid helium by using radiation detection method. With this method we tackled with determination of extraction probability, its dependence on temperature and barrier height at the interface of liquid-vapour phases.
The improvements realised were ; 1.extraction potential barrier for the positive ions has been determined for the first time and this is almost equivalent for the extraction of electrons. 2.The snowball production rate at the 215Po source has been improved by applying higher electric field on the surface of the source. 3.The extraction has become more effective by using pulsed second sound for raising locally and instantaneously the surface temperature. We attained the precise determination of probability, its temperature dependence on barrier height. Nuclear spectroscopy experiments with radioactive nuclear beams have been developed further in parallel with these.
Rich variety of heavy-ion reaction products will be stopped in superfluid helium and emerge as ultra-cold (zero- energy) radioactive beams. It is expected that this novel method is applicable in the new projects planned in the world. The GSI Darmstadt is counted as one of such institutions.
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[Journal Article] Exclusive Measurement of the Astrophysical 8Li(α,n) Reaction Cross Section2004
Author(s)
H.Miyatake, H.Ishiyama, M-H.Tanaka, Y.X Watanabe, N.Yoshikawa, S.C., Jeong, Y.Matsuyama, Y.Fuchi, T.Nomura, T.Hashimoto, T.Ishikawa, K.Nakai, S.K.Das, P.K.Saha, T.Fukuda, K.Nishio, S.Mitsuoka, H.Ikezoe, S.Ichikawa, M.Matsuda, Y.Mizoi, T.Furukawa, H.Izumi, T.Shimoda, M.Terasawa
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Journal Title
Nuclear Physics A 738
Pages: 401-405
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Spin-parity Assignments in 15C^* by a New Method : β-Delayed Spectroscopy for a Spin-Polarized Nucleus2003
Author(s)
H.Miyatake, H.Ueno, Y.Yamamoto, N.Aoi, K.Asahi, E.Ideguchi, M.Ishihara, H.Izumi, T.Kishida, T.Kubo, S.Mitsuoka, Y.Mizoi, M.Notani, H.Ogawa, A.Ozawa, M.Sasaki, T.Shimoda, T.Shirakura, N.Takahashi, S.Tanimoto, K.Yoneda
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Journal Title
Physical Review, C 67
Pages: 014306-1-014306-9
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Direct Measurements of (α,n) and (p,n) Reaction Cross Sections Using Light Neutron-Rich Radioactive Nuclear Beams2003
Author(s)
H.Ishiyama, T.Hashimoto, T.Kawamura, T.Ishikawa, H.Miyatake, M.H.Tanaka, Y.Fuchi, N.Yoshikawa, S.C.Jeong, Y.Watanabe, H.Kawakami, I.Katayama, T.Nomura, S.Mitsuoka, K.Nishio, M.Matsuda, S.Ichikawa, H.Ikezoe, T.Furukawa, H.Yano, H.Izumi, Y.Mizoi, M.Terasawa, T.Fukuda, K.Nakai, T.Shimoda
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Journal Title
Nuclear Physics, A 718
Pages: 481c-483c
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Measurement of the 16N(α,n) Reaction Cross Section2003
Author(s)
T.Ishikawa, H.Ishiyama, T.Hashimoto, T.Kawamura, H.Miyatake, M.H.Tanakab, Y.Fuchi, N.Yoshikawa, S.C.Jeong, Y.Watanabe, H.Kawakami, I.Katayama, T.Nomura, S.Mitsuoka, K.Nishio, M.Matsuda, S.Ichikawa, H.Ikezoe, T.Furukawa, H.Yano, H.Izumi, Y.Mizoi, M.Terasawa, T.Fukuda, K.Nakai, T.Shimoda
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Journal Title
Nuclear Physics, A 718
Pages: 484c-486c
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Spin Polarization of Low-Energy Radioactive Nuclear Beams by Tilted-Foil Technique2002
Author(s)
S.Shimizu, E.Doumoto, M.Yagi, M.Asai, M.Nakamura, Y.Hirayama, K.Horie, T.Shigematsu, H.Izumi, T.Shimoda, N.Takahashi
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Journal Title
Nuclear Physics, A 701
Pages: 524c-527c
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A Spin Polarizer for Radioactive Nuclear Beams by Taking Advantage of Polarized Electron Transfer Reactions2002
Author(s)
T.Shimoda, S.Shimizu, E.Doumoto, M.Yagi, M.Asai, M.Nakamura, Y.Hirayama, K.Horie, T.Shigematsu, H.Izumi, N.Takahashi
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Journal Title
Nuclear Physics, A 701
Pages: 583c-587c
Description
「研究成果報告書概要(欧文)」より
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