2018 Fiscal Year Final Research Report
Spin transfer from atomic vapor to condensed materials: development of hyperpolarized separator
| Project/Area Number |
16H04030
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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 |
Atomic/Molecular/Quantum electronics
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| Research Institution | University of Hyogo |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 核スピン偏極 / 光ポンピング / アルカリ金属原子 / 超微細分裂 / 量子干渉 |
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| Outline of Final Research Achievements |
By optical pumping of hot vapors, spin angular momentum of the metal atoms can be transferred to condensed matter. We have demonstrated the spin injection optical pumping of solid materials by using cesium atoms. We planned the technique to be applied to lithium and silver atoms because the ion conductivities are significantly large. In this projects, we developed high-temperature vapor cells and studied binary-metal alloys with nuclear magnetic resonance for stable vapor density. We measured diffusion coefficient of lithium atoms in buffer gas, and performed atomic spectroscopy at high temperature. Coherent population trapping enables us to measure the hyperfine splitting frequency of ground-state lithium atoms in several buffer gases. We presents potential atomic magnetometry at high temperatures.
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| Free Research Field |
量子エレクトロニクス，原子物理学
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| Academic Significance and Societal Importance of the Research Achievements |
物体が運動量を持つということは物体が並進運動していることであり，物体が角運動量を持つということは物体が回転運動していることを表す． ところが，スピン自由度まで含めると，静止している物体にも角運動量という物理量が内在する． その角運動量－回転運動という性質－を物体から取り出すことができるだろうか． 本研究の学術的意義は，スピン角運動量を物体のマクロな回転運動へ散逸させてしまう緩和現象を解明することである． 社会的意義として，角運動量を取り出し，角運動量をさまざまな物質に移し，磁気共鳴画像診断などが高機能化，高精細化する技術の創出につながる．
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