Detection of the time variance of the mass ratio of electron to proton
| Project/Area Number |
23540466
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 Toyama |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ENOMOTO Katsunari 富山大学, 大学院・理工学研究部(理学), 准教授 (50452090)
KAJITA Masatoshi 独立行政法人情報通信研究機構, 次世代ネットワーク研究センター, 主任研究員 (50359030)
MATSUSHIMA Fusakazu 富山大学, 大学院・理工学研究部(理学), 教授 (40142236)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 精密測定 / イオントラップ / 分子分光 / 低温分子 / レーザー分光 / 分子イオン |
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| Research Abstract |
We have proposed the precise measurement of vibrational transition in the ground electronic state of CaH+ for the test of the temporal change of the mass ratio of electron to proton. We have carried out ab initio calculations of Ca+-H pair potential to evaluate the transition frequency and intensity of the CaH+ in the several low lying states. We have employed the laser ablation of Ca metal in the hydrogen gas to produce CaH+ containing plasma and measured several bands of absorption lines. Although most of them were assigned to the transitions of neutral CaH, several bands have been left to be assigned, and might contain the CaH+ transitions. We have also developed a Stark guide of neutral polar molecules to introduce cold molecule into the ion trap and to produce cold CaH+. Several molecules (ND3, NH3, CH3OH, and CH3F) have been guided and their velocity distributions have been measured. By lowering the nozzle temperature down to 210K, molecular flux has been increased up to twice.
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Report
(4 results)
Research Products
(13 results)
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[Presentation] 低速分子の生成2012
Author(s)
米山直弥, 鈴木伸明, 東川優理奈, 榎本勝成, 松島房和, 森脇喜紀
Organizer
日本物理学会2012年秋季大会
Place of Presentation
横浜・横浜国立大学
Year and Date
2012-09-19
Related Report
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