The cavity ring-down spectra (CRDS) of nitrous oxide were recorded at a pressure of 10 hPa in the 11,937–12,223 cm-1 range with a threshold sensitivity to absorption coefficient of the order of 6.5 × 10–11 cm-1. Three bands (ν1+5ν3, 6ν1+2ν3, and 3ν1+4ν3) were detected. The line centers and intensities were recovered from the observed spectra. The spectroscopic constants of the upper vibrational states and the vibrational transition dipole moment parameters were fitted to the measured line positions and intensities, respectively. It was found that the 3ν1+4ν3 band is in the interpolyad Coriolis resonance interaction with the 7ν1+7ν21 band. This interaction leads to the appearance in the spectra of the four extra lines of the 7ν1+7ν21 band.

中文翻译：

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14N216O 在 0.83 μm 附近的光腔衰荡光谱


在 10 hPa 的压力下，在 11,937–12,223 cm-1 范围内记录了一氧化二氮的光腔衰荡光谱 （CRDS），对吸收系数的阈值敏感性约为 6.5 × 10–11 cm-1。检测到三个波段 （ν1+5ν3 、 6ν1+2ν3 和 3ν1+4ν3）。线中心和强度是从观察到的光谱中恢复的。将上部振动状态的光谱常数和振动过渡偶极矩参数分别拟合到测量的线位置和强度。研究发现，3ν1+4ν3 波段与 7ν1+7ν21 波段处于多聚体科里奥利共振相互作用中。这种相互作用导致光谱中出现 7ν1+7ν21 波段的四条额外线。