A continuous-wave cavity ring-down spectrometer was employed to record the spectrum of the acetylene molecule spanning the 12350 - 12790 cm region. A total of 747 lines from the principal isotopologue and 68 lines from CCH were identified, with nearly all line intensities retrieved from the spectra. These lines belong to eighteen vibrational bands of CH and two vibrational bands of CCH, among which five vibrational bands are reported here for the first time. Spectroscopic constants were deduced for all the identified bands, and the vibrational dipole moment squared along with Herman–Wallis coefficients were determined for the majority of these bands. Additionally, several resonance interactions were thoroughly explored.

中文翻译：

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乙炔附近的光腔衰荡光谱[公式省略]


采用连续波腔衰荡光谱仪记录乙炔分子跨越 12350 - 12790 cm 区域的光谱。总共鉴定了主要同位素体的 747 条线和 CCH 的 68 条线，几乎所有线强度均从光谱中检索。这些谱线属于CH的18个振动带和CCH的2个振动带，其中5个振动带是首次报道。推导了所有已识别谱带的光谱常数，并确定了大多数谱带的振动偶极矩平方以及赫尔曼-沃利斯系数。此外，还深入探讨了几种共振相互作用。