The Q-branch of the ν₁+ν₃+3ν₄ cold band of ¹²C₂H₂ located at 8330 cm⁻¹ has been observed under one kilometer absorption path length. The analysis leads to a line list for this isolated and strong Q-branch that is missing from spectroscopic databases. This work completes the large update of acetylene data in the ΔP = 13 spectral region (8200 and 8900 cm⁻¹) made in spectroscopic databases (HITRAN and GEISA) in 2020 edition.

中文翻译：

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12C2H2的ν1+ν3+3ν4带的Q支位于8330 cm−1

¹² C ₂ H ₂的ν ₁ +ν ₃ +3ν ₄冷带的Q-分支位于8330 cm ^-1处，在一公里吸收路径长度下已被观察到。分析得出了光谱数据库中缺少的这种孤立且强Q分支的行列表。这项工作完成了2020年版光谱数据库（HITRAN和GEISA）中ΔP  =13光谱区域（8200和8900 cm ^{-1 ）乙炔数据的大规模更新。}