2014 Fiscal Year Final Research Report
Search for resonance states in the positronium negative ion
| Project/Area Number |
25887046
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
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| Project Period (FY) |
2013-08-30 – 2015-03-31
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| Keywords | ポジトロニウム負イオン / 原子・分子物理 / 低速陽電子ビーム / 形状共鳴 |
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| Outline of Final Research Achievements |
In the present study, a laser spectroscopy of the positronium negative ion has been conducted in order to observe the resonances of 1P symmetry in its one-photon detachment process. By using a high-intensity ion beam and a tunable ultraviolet laser source(225 - 230 nm), we succeeded to observe a shape resonance, which is predicted above Ps (n=2) formation threshold. The estimated resonance energy is in good agreement with three-body calculations.
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| Free Research Field |
数物系科学
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