用可调谐二极管激光光谱仪观测3657—3708cm-1区域CO2高分辨振转光谱

用可调谐二极管激光光谱仪观测到3657—3708cm^-1区域内CO₂各种同位素分子的9个振转谱带。首次观测到¹²C¹⁶O¹⁷O的10011—00001谱带和¹²C¹⁶O¹⁸O的11111—01101谱带,对其余7个谱带则扩充了其观测振转线的数目。用最小二乘方拟合法计算了各谱带的光谱常数,发现CO₂分子常数表中¹²C¹⁶O¹⁷O的10011—00001谱带中心v的计算值比本实验观测值大0.287cm^-1,而¹²C¹⁶O¹⁸O的11111—01101谱带中心v₀的计算值则比本实验观测值小0.048cm^-1。 关键词：

TUNABLE DIODE LASER SPECTROSCOPY OF CO2 IN THE 3657-3708 cm-1 REGION

Nine vibration-rotational bands of various isotopic species of CO₂ have been assigned in the 3657-3708 cm^-1 region using a tunable diode laser spectrometer. Two of these bands, i.e. the 10011-00001 of ¹²C¹⁶O¹⁷ and the 11111-01101 of ¹²C¹⁶O¹⁸ were observed for the first time. The now accepted caleulated value of the 10011-00001 band originated from ¹²C¹⁶O¹⁷ is found to deviate from our observed value by 0.287 cm^-1 and that of the 11111-01101 band originated frorn ¹²C¹⁶O¹⁸ by 0.048 cm^-1.