Behaviour of Ions of Unstable Nuclei in Superfluid Helium
| Project/Area Number |
01044083
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | Osaka University |
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Principal Investigator |
TAKAHASHI Noriaki Osaka University, Professor, 教養部物理, 教授 (10028152)
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| Co-Investigator(Kenkyū-buntansha) |
HASS Michael Weizmann Institute of Science, Professor, 核物理学部, 教授
MUNZENBERG G GSI, 核化学講座, 研究員
TRAUTMANN Wolfgang GSI, Physicist, 核物理学講座, 研究員
FUJITA Yoshitaka Osaka University, Assistant, 教養部物理, 助手 (60093457)
SHIMODA Tadashi Osaka University, Associate Professor, 教養部物理, 助教授 (70135656)
MUNZENBERG Gottfried GSI, Physicist
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| Project Period (FY) |
1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1989: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | Superfluid helium / Impurity ion / Snowball / Microcluster / Beta radioactive nucleus / Radiocactive nuclear beam / Beta detection method / Alpha detection method / Accelerator SIS-ESR / GSI |
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| Research Abstract |
It has long been known that a positive ion, if introduced in superfluid helium, exerts electrostriction on helium atoms surrounding it and acquires effective mass of 50 - 100 times the helium mass. Such a charged aggregate of helium atoms around an impurity ion is referred to as a snowball. High-energy beam of short-lived beta- and alpha-radioactive ions are introduced into superfluid helium as impurity ions and the snowballs formed around the radioactive ions are detected by the beta- and alpha-particles. Our interest is the use of ^6He and ^8He and many other short-lived beta- and alpha-active nuclei to study transport phenomena related to impurity ions and interactions of impurity ions with basic excitations in superfluid helium. Possibility has been pursued of carrying out an experimental project; STUDY OF CONDENSED MATTER AT LOW TEMPERATURE WITH RADIOACTIVE NUCLEAR BEAMS, at the newly constructed accelerator complex SIS-ESR of GSI at Darmstadt, Germany.
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Report
(1 results)
Research Products
(10 results)
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[Publications] K. Ashahi, M. Ishihara, N. Inabe, T. Ichihara, T. Kubo, M. Adachi, H. Takahashi, M. Kouguchi, M. Fukuda, D. Mikolas, D.J. Morrissey, D. Beaumel, T. Shimoda, H. Miyatake and N. Takahashi: "New Aspect of Intermediate Energy Heavy Ion Reactions - Large Spin Polarization of Fragments" Phys. Rev. Lett.
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