Abstract

The spectrum of the ¹⁵N¹⁶O molecule is recorded in the 5200–5500 сm⁻¹ region and analyzed. As a result of the analysis, 150 Λ-doublets of vibration–rotational lines were found in the 3–0 band of the main transitions between the ²Π_1/2 and ²Π_3/2 electronic states. For 108 of them, with the splitting value higher than 4.5 × 10⁻³ сm⁻¹, positions and relative intensities of each component of the doublet were found with the self-broadening parameter fixed to the value from HITRAN2020 and the equal intensities of the e and f components. The maximal value of the rotational quantum number J was 30.5. The transition frequencies recorded and weighted in accordance with the experimental uncertainties were processed by the program code using the nonlinear least-squares method. As a result of processing, the spectroscopic constants for the v = 3 vibrational state of the ¹⁵N¹⁶O isotopologue were found. The Λ-doubling constants for this state are determined for the first time. The results are compared with the well-known database of spectroscopic information HITRAN2020.

中文翻译：

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15N16O分子地电子态(3-0)振动带的光谱参数

摘要

¹⁵ N ¹⁶ O 分子的光谱记录在 5200–5500 сm ^-1区域并进行分析。^{分析的结果是，在2} Π _1/2和² Π _3/2电子态之间的主跃迁的3-0能带中发现了150个振动-旋转线的Λ双峰。对于其中的 108 个，其分裂值高于 4.5 × 10 ^-3 сm ^-1，在自展宽参数固定为 HITRAN2020 的值和等强度的双峰中，找到了双峰每个组分的位置和相对强度。e和f成分。旋转量子数J的最大值为30.5。根据实验不确定性记录和加权的过渡频率由程序代码使用非线性最小二乘法进行处理。作为处理的结果，找到了¹⁵ N ^{16 O 同位素体}v = 3 振动状态的光谱常数。首次确定了该状态的Λ倍增常数。结果与著名的光谱信息数据库HITRAN2020进行了比较。