来自CH₃OH的光泵远红外激光谱线：新的激光谱线、频率测量及归属

Optically Pumped FIR Laser Lines from CH3OH: New Laser Lines, Frequency Measurements, and Assignments.

作者信息

Telles EM, Odashima H, Zink LR, Evenson KM

机构信息

Time and Frequency Division, National Institute of Standards and Technology-NIST,3, 325 Broadway, Boulder, Colorado, 80303-3328

出版信息

J Mol Spectrosc. 1999 Jun;195(2):360-366. doi: 10.1006/jmsp.1999.7834.

DOI:10.1006/jmsp.1999.7834

PMID:10329282

Abstract

We report the identification and characterization of eight new FIR laser lines from methanol (CH3OH) in the range 48.4 to 453.7 µm pumped by sequence and hot bands of a cw CO2 laser. Frequency measurements for most of the new FIR laser lines and from previously reported ones were obtained in the range 0.6-6.8 THz with a one-sigma reproducibility of two parts in 10(7). We propose an assignment of energy levels for two of the new laser lines and for five pumped by 10R(46) previously reported. The high frequency lines with absorption centers outside of the tuning range of the CO2 laser pump showed doublets. These were used to evaluate the offsets of the CO2 absorption transitions.

摘要

我们报告了从甲醇（CH₃OH）中识别和表征出的八条新的远红外激光谱线，其波长范围在48.4至453.7 µm之间，由连续波二氧化碳激光的序列带和热带泵浦产生。大部分新的远红外激光谱线以及先前报道的谱线的频率测量值是在0.6 - 6.8太赫兹范围内获得的，其一西格玛再现性为十万分之二。我们对其中两条新激光谱线以及先前报道的由10R(46)泵浦的五条谱线提出了能级归属。在二氧化碳激光泵调谐范围之外具有吸收中心的高频谱线呈现出双峰。这些双峰被用于评估二氧化碳吸收跃迁的偏移。