使用一氧化碳泛音边带光谱仪对近2900厘米⁻¹处的羰基硫化物进行亚多普勒外差频率测量。

Sub-Doppler Heterodyne Frequency Measurements on OCS Near 2900 cm-1 Using a CO Overtone Sideband Spectrometer.

作者信息

Frech B, Mürtz M, Palm P, Lotze R, Urban W, Maki AG

机构信息

Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, Bonn, D-53115, Germany

出版信息

J Mol Spectrosc. 1998 Jul;190(1):91-100. doi: 10.1006/jmsp.1998.7569.

DOI:10.1006/jmsp.1998.7569

PMID:9645928

Abstract

We present sub-Doppler heterodyne frequency measurements on 10 rovibrational transitions of carbonyl sulfide (OCS) between 2894 and 2910 cm-1. The measurements were made using a CO overtone laser which had limited tuneability through the generation of microwave sidebands in a CdTe crystal. With this technique the laser frequencies were shifted to the desired OCS transition frequencies. The transition frequencies could be measured with uncertainties less than 30 kHz (Deltanu/nu = 3 x 10(-10)) by frequency offset-locking the CO overtone laser to combination frequencies of two saturation-stabilized CO2 laser standards. The measured transition frequencies of OCS were combined with previous sub-Doppler, Fourier transform, and microwave measurements to recalculate improved calibration tables for the 10(0)1-00(0)0, 11(1e)1-01(1e)0, and 11(1f)1-01(1f)0 bands. These tables are suitable for the calibration of infrared spectrometers in the 87 THz region (near 2900 cm-1). Copyright 1998 Academic Press.

摘要

我们展示了对羰基硫（OCS）在2894至2910厘米⁻¹之间的10个振转跃迁的亚多普勒外差频率测量结果。测量使用了一台CO泛频激光器，该激光器通过在碲化镉晶体中产生微波边带来实现有限的可调谐性。利用这种技术，激光频率被移至所需的OCS跃迁频率。通过将CO泛频激光器频率偏移锁定到两个饱和稳定的CO₂激光标准的组合频率上，跃迁频率的测量不确定度可小于30千赫兹（Δν/ν = 3×10⁻¹⁰）。将测得的OCS跃迁频率与先前的亚多普勒、傅里叶变换和微波测量结果相结合，重新计算了10(0)1 - 00(0)0、11(1e)1 - 01(1e)0和11(1f)1 - 01(1f)0波段的改进校准表。这些表格适用于87太赫兹区域（接近2900厘米⁻¹）的红外光谱仪校准。版权所有1998年学术出版社。