Microwave Spectroscopy of Carbon-chain Molecules by Laser Evaporation

激光蒸发碳链分子的微波光谱

• 批准号: 03640426
• 负责人: YAMAMOTO Satoshi
• 金额: $ 1.28万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640426/
• 关键词: Microwave Spectrum; Laser Evaporation; Transient Species; レ-ザ蒸発; 星間分子; フリ-ラジカル

An apparatus for laser evaporation has been developed to measure the microwave spectrum of transient species such as free radicals and molecular ions. For this purpose, a stainless-steel vacuum chamber evacuated by an oil diffusion pump (7000 1/s) is constructed. This apparatus is combined with a Fourier transform microwave spectrometer newly developed. The sensitivity tests are carried out by observing the J=1-0 line of various isotopic species of OCS. The line of ^<18>O^<13>CS whose abundance is 0.002 % is easily observed with accumulation of 1000 shots. An optical system for laser evaporation by the ArF laser is now being built. After completion this, we will be able to measure the microwave spectra of transient species produced by laser evaporation.

已经开发出一种激光蒸发装置来测量自由基和分子离子等瞬态物质的微波光谱。为此，构建了一个由油扩散泵（7000 1/s）抽空的不锈钢真空室。该装置与新开发的傅里叶变换微波光谱仪相结合。通过观察OCS各种同位素种类的J=1-0线进行灵敏度测试。丰度为0.002％的^ 18 O ^ 13 CS线通过累积1000次射击而容易观察到。目前正在建造一个利用 ArF 激光器进行激光蒸发的光学系统。完成此操作后，我们将能够测量激光蒸发产生的瞬态物质的微波光谱。

项目成果

S.Yamamoto, H.Mikami, S.Saito, N.Kaifu, M.Ohishi, and K.Kawaguchi: "SiO in Barnard 1" Publ. Astron. Soc. Japan. 44. 459-467 (1992)

S.Yamamoto、H.Mikami、S.Saito、N.Kaifu、M.Ohishi 和 K.Kawaguchi：“Barnard 1 中的 SiO”Publ。

Masataka Mizushima: "Microwave Absorption Lines of ^O^O in Its(X^3Σg^-,υ=0)State" Journal of Molecular Spectroscopy. 148. 447-452 (1991)

Masataka Mizushima：“^<16>O^<18>O 在其(X^3Σg^-,υ=0)状态下的微波吸收线”分子光谱学杂志 148. 447-452 (1991)。

S.Yamamoto: "SiO in Rarnard l" Publ.Astron.Soc.Japan. 44. 459-467 (1992)

S.Yamamoto：“Rarnard l 中的 SiO”Publ.Astron.Soc.Japan。

F.Lovas: "Microwave spectra and electric dipole moments for low-J levels of interstellar radicals:SO,C_2S,C_3S,c-HC_3,CH_2CC,and c-C_3H_2" Astrophys.J.399. 325-329 (1992)

F.Lovas：“星际自由基低 J 水平的微波光谱和电偶极矩：SO、C_2S、C_3S、c-HC_3、CH_2CC 和 c-C_3H_2”Aastrophys.J.399。

H.Suzuki: "A survey of CCS,HC_3N,HC_5N,and NH_3 toward dark clouds cores and their production chemistry" Astrophys.J.392. 551-570 (1992)

H.Suzuki：“针对暗云核心的 CCS、HC_3N、HC_5N 和 NH_3 及其生产化学的调查”Astrophys.J.392。