| Project/Area Number |
12440065
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 University |
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Principal Investigator |
SHIMODA Tadashi Graduate School of Science, Osaka University, Professor, 大学院・理学研究科, 教授 (70135656)
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| Co-Investigator(Kenkyū-buntansha) |
MIYATAKE Hiroaki Institute of Particle and Nuclear Physics (KEK), Associate Professor, 助教授 (50190799)
SHIMIZU Suguru Graduate School of Science, Osaka University, Research Associate, 大学院・理学研究科, 助手 (60294146)
IZUMI Hideaki Graduate School of Science, Osaka University, Research Associate, 大学院・理学研究科, 助手 (50294153)
FUKUDA Tomokazu Osaka Electro-communication University, Professor, 工学部, 教授 (50116092)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥15,400,000 (Direct Cost: ¥15,400,000)
Fiscal Year 2001: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2000: ¥11,300,000 (Direct Cost: ¥11,300,000)
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| Keywords | unstable nucleus / neutron halo / N=8 magic number / beta-delayed neutrons / level scheme / spin-parity assignment / optical pumping / EOM / スピン編極 / β遅発中性子崩壊 / 励起準位 / 傾斜薄膜法 / 偏極電子移行反応 / レーザー光ポンピング / 11Be / スピン偏極 / レーザ光ポンピング |
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| Research Abstract |
The exotic structure of nuclei far from the stability are attracting much interest because they provide stringent tests for our understanding of nuclei. We propose a new method to determine the spin-parities of excited states of nuclei far from the stability. The essential point is that we observe the beta-decay anisotropy from a spin polarized radioactive nucleus in coincidence with beta-delayed particles. We will apply this method to 11Li in order to investigate the disappearance of the N=8 neutron magic number in very neutron rich nuclei.
The research proposal has been approved with high priority at ISAC facility of TRIUMF in Canada, which is a state-of-the-art radioactive nuclear beam facility. In 2001 and 2002, we achieved the following preparatory works :
(1) Achieving highly polarized 11Li beam,
(2) Constructing a dedicated beam-line,
(3) Constructing detector systems for beta-rays, beta-delayed neutrons, and gamma-rays.
All will be ready by April, 2002, and the experiment is scheduled in May 2002.
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