波長可変遠赤外光源を用いた分光法の広帯域化と高分解能化

使用波长可调远红外光源的宽带和高分辨率光谱

• 批准号: 08640501
• 负责人: 松島 房和
• 金额: --
• 依托单位: University of Toyama
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640501/
• 关键词: 分子分光学; レーザー分光学; サブミリ波分光; 遠赤外分光; 回転スペクトル; 分子イオン; 星間分子; プロトネ-テッドヘリウムイオン

本研究の目的は,これまで我々が開発し使用してきた,炭酸ガスレーザー差周波型の遠赤外分光計に改良を加えることにより,(1)非線形分光の手法により分解能のより高い測定を行えるようにすること,(2)分光計の周波数域を現在の上限の6THzよりさらに高周波側へ拡張すること(3)これら成果を分子のスペクトル測定に応用すること,である。予算は年度後半に補正として認められたので,半年遅れのスタートであったが,目標(1)(2)はほぼ8割がた達成し,目標(3)では(1)の一部成果を利用して分子イオンの測定が行われ,Physical Review Letter誌に成果発表を行った。各目標にたいする成果は具体的に以下の通りである。(1)非線形分光法の1つである飽和くぼみを観測できるように,分光計に適したファブリーペロ型光共振器を設計し,反射鏡の発注を行った。これに先立ち予備的な実験を行い設計のためのデータを揃えた。また,光源の強度を強くするために,2波混合型の分光計を組立て,実際に使用できるようにしたり,光混合用のダイオードの特性を改良した。反射鏡を入手次第最終的な実験にかかる。(2)周波数を高周波側へのばすために,光混合用に出力1ワット級の半導体レーザーを用意し,これらの基本性能を調べた。また,同種レーザーと外部共振器を用いて周波数制御が行えるようにした。レーザー用の電源が2組揃ったら最終的な光混合実験を行う。(3)目標(1)で得られた光源の改良により,吸収強度の弱い分子イオンのスペクトルの測定ができた。HeH^+イオンの回転スペクトルについて周波数の測定,解析を行い発表した。

The purpose of this study is to develop the application of carbon dioxide in the field of infrared spectroscopy.(1) The method of nonlinear spectroscopy is used to determine the decomposition energy of carbon dioxide.(2) The upper limit of the frequency domain of the spectrometer is 6THz.(3) The frequency domain of the spectrometer is 6 THz.(4) The frequency domain of the spectrometer is 6 THz. In the second half of the year, the goal (1) and (2) were achieved. In the third half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (1) was achieved. In the fourth half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (1) was achieved. In the fourth half of the year, the goal (2) was achieved. In the fourth half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (1) was achieved. In the fourth half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (1) was achieved. In the fourth half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (1) was achieved. In the fourth half of the year, the goal (3) was achieved. In the fourth half of the year, the goal (4) was achieved. The results of each goal are specific to the following (1)Non-linear spectroscopy is used to measure the saturation of light in the spectrometer, and the design of optical resonators and reflection mirrors is carried out. This is the first time I've ever been in a position to do this. In addition, the intensity of the light source is strong, and the characteristics of the spectrometer for 2-wave mixing are improved in practice. The mirror starts with the final step. (2)The frequency of the laser beam is higher than the frequency of the laser beam. The same kind of external resonator is used to control the frequency of the wave. The power supply of the two sets of lights is finally mixed. (3)Objective (1) To obtain the improvement of the light source, and to determine the absorption intensity of weak molecules. He H ^+ is the only one who can determine the number of cycles and analyze them.

项目成果

Fusakazu Matsushima: "Observation of the Rotational Spectra of ^4HeH^+,^4HeD^+,^3HeH^+,and ^3HeD^+" Physical Review Letters. 78・9. 1664-1666 (1997)

Fusakazu Matsushima：“^4HeH^+、^4HeD^+、^3HeH^+ 和 ^3HeD^+ 的旋转光谱的观察”物理评论快报 78・9 (1997)。