Abstract The (1 0 0 5) 1,2 → (1 0 0 4) 1,2 and (1 0 0 6) 1,2 → (1 0 0 5) 1,2 emission bands of 12 C 16 O 2 have been recorded near 4.5 μm by Fourier transform spectroscopy of a CO 2 + N 2 mixture excited by dc discharge. The spectroscopic parameters of the (1 0 0 v 3 ) 1,2 vibrational states with v 3 = 0–6 have been obtained from a global rotational analysis of the six (1 0 0 v 3 ) 1,2 → (1 0 0 ( v 3 –1)) 1,2 emission bands ( v 3 = 1–6). The (1 0 0 5) 1,2 vibrational states of both 12 C 16 O 2 and 13 C 16 O 2 have been observed by direct absorption from the vibrational ground state by Intracavity Laser Absorption Spectroscopy near 12 700 and 12 400 cm −1 , respectively. The rovibrational energy levels obtained by the two experimental techniques are discussed and compared with those calculated in the framework of the effective operator approach.

中文翻译：

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12CO2和13CO2的ν1+ 5ν3对偶

摘要 12 C 16 O 2 的 (1 0 0 5) 1,2 → (1 0 0 4) 1,2 和 (1 0 0 6) 1,2 → (1 0 0 5) 1,2 发射带具有由直流放电激发的 CO 2 + N 2 混合物的傅立叶变换光谱在 4.5 μm 附近记录。(1 0 0 v 3 ) 1,2 振动态的光谱参数与 v 3 = 0–6 已经从六个 (1 0 0 v 3 ) 1,2 → (1 0 0 ( v 3 –1)) 1,2 个发射波段 ( v 3 = 1–6)。12 C 16 O 2 和 13 C 16 O 2 的 (1 0 0 5) 1,2 振动态已通过腔内激光吸收光谱在 12 700 和 12 400 cm -1 附近的振动基态直接吸收而观察到， 分别。讨论了通过两种实验技术获得的振动能级，并与在有效算子方法框架中计算的那些进行了比较。