1.31μm附近水汽分子的自加宽系数、氮气加宽系数的测量

采用窄线宽二极管激光器与1 km的怀特池相结合来提高光谱探测灵敏度,最小可探测谱线吸收强度为10-27cm-1/(molecule.cm-2)。根据记录的光谱数据精确计算出7599~7616 cm-1波段内水汽分子的谱线强度、自加宽系数和氮气加宽系数,实验结果与HITRAN96和HITRAN2004数据库进行了比较,存在一些差异。测量的谱线参量与HITRAN96相接近,与HITRAN2004相差较大,有7条HITRAN96中没有的新谱线被观测,有5条在HITRAN2004数据库中被证实,另外观测到2条谱线在HITRAN96中被列出,而在HITRAN2004没有给出。

Measurement of Self-Broadening and N2 Broadening Coefficients of Water Vagor Molecule Near 1.31 μm

High-resolution absorption spectroscopy of water vapor molecule was recorded by narrow linewidth diode laser and a kilometer order White cell, minimum detectable line strength is 10-27 cm-1/(molecule·cm-2. The line strength, the self broadening and N2 broadening coefficients of water vapor molecule in the 7599～7616 cm-1 region were accurately determined. The measured line parameters are compared with HITRAN96 and HITRAN2004 databases, some differences exist. The measured line parameters consist with HITRAN96 database, but there exists large difference with HITRAN2004 database. Seven new lines unlisted in HITRAN96 data base were observed, five of them were confirmed in HITRAN2004 data base. Another two lines listed in HITRAN96 data base were observed, but unlisted in HITRAN2004 data base.