Spectroscopic study of CH5+ molecular ion by infrared double resonance

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05391
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Okayama University
• Principal Investigator: TANG JIAN 岡山大学, グローバル人材育成院, 教授 (40379706)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: プロトン化メタン / 赤外分光 / 二重共鳴

Outline of Final Research Achievements

CH5+ molecular ion has been detected by mass analysis in lab and on the satellite Titan of Saturn, and the infrared spectrum of CH5+ has also been observed in laboratory. Although the detection of the interstellar CH5+ is expected, it has been hindered by the failure of the spectral assignment for long time. In the present study, we aimed to reveal the spectral assignment for CH5+ by the infrared double resonance.
Although we can observe the infrared spectrum of CH5+ by the highly sensitive cavity ring-down spectroscopy, we failed to observe the CH5+ signal of infrared double resonance with a cw laser and a pulsed laser. Since there is no previous example for the observation of mid-infrared double resonance of molecular ions, the present work should be an importance step towards the future realization.

Free Research Field

分子分光学