| Project/Area Number |
09640347
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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 | KYOTO UNIVERSITY |
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Principal Investigator |
NAKAMURA Masanobu Kyoto Univ., Dept. Phys., Lecturer, 大学院・理学研究科, 講師 (90025479)
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| Co-Investigator(Kenkyū-buntansha) |
IMAI Kenichi Kyoto Univ., Dept. Phys., Professor, 大学院・理学研究科, 教授 (70025493)
MURAKAMI Tetsuya Kyoto Univ., Dept. Phys., Instruc., 大学院・理学研究科, 助手 (50219896)
YOSOI Masaru Kyoto Univ., Dept. Phys., Instruc., 大学院・理学研究科, 助手 (80183995)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | UNSTABLE NUCLEI / NEUTRON HALO / SPIN / POLARIZATION / 中性子ハロ- / パリティ / 偏極ビーム |
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| Research Abstract |
The developments of radioactive beam, produced through the projectile-fragmentation process are opening a new field of nuclear physics : the structure of unstable nuclei. The nucleus ィイD111ィエD1Be shows a remarkably large interaction radius and this is the best known case of a one-neutron halo nuclei. But, there is a little experimental information, and the effort to acquire knowledge in the various parity of the final state by using the ィイD110ィエD1Be (d, p) ィイD111ィエD1Be reaction. As for the ィイD110ィエD1Be target, the BeO on platinum foil was used. The energy of the excited state arid the life of the unstable nucleus which was produced by he (d, p) reaction were examined from the measurement of the gamma ray and the beta ray, and the formation of 11Be was confirmed. The impurities of the oxide that the surface of platinum foil were examined by using the backward proton scattering, and it was found out that there were many C and O in comparison with Be about two orders. Therefore, it found out that it was difficult to measure the analyzing power for the proton of the (d, p) reaction by using this target.
The polarized deuteron beam was obtained from the Kyoto University Tandem Accelerator. The ion source was the atomic-beam type and the improvement of time this source was done on a parallel with the development of the ィイD110ィエD1Be target. The polarized proton beam of several 10 nA could be formed stably by remodeling the cooling system of the dissociator nozzle, the magnet of the weak-field RF transition, the pumping system of the ECR ionizer and the charge exchange part and so on.
The polarized deuteron measurement becomes possible by the installation of the device which controls the spin such as a Wien filter. The development of the thin target of ィイD110ィエD1Be with a very thin support is the future subject.
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