| Project/Area Number |
15K13545
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Sophia University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
梶田 雅稔 国立研究開発法人情報通信研究機構, 電磁波研究所時空標準研究室, 主任研究員 (50359030)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | イオントラップ / クーロン結晶 / 分子イオン / 陽子-電子質量比 / CaH+ / レーザー冷却 / 光解離 / 回転温度 / 分子イオン分光 / 陽子ー電子質量比 |
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| Outline of Final Research Achievements |
The purpose of the present work is determination of rovibrational constants of CaH+, which is one of the best candidates for studying possible time variation of the proton-electron mass ratio by ultraprecise vibrational spectroscopy. In order to measure the rovibrational constants, we have constructed a cryogenic linear Paul trap for rotational cooling of Coulomb crystallized CaH+ ions and laser spectroscopy system consisting of a mid-infrared laser and a violet semiconductor laser. We also performed a photodissociation experiment in order to determine the rovibrational constants. We successfully observed the photodissociation reaction CaH+ + hν → Ca+ + H. The lower limit of the photodissociation cross section was determined by the measurement of the photodissociation rate. This experimental progress paved the way to measure the rovibrational constant of CaH+ through LIF measurements.
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