The molecular oxygen 118-GHz line intensity revision

IF 1.4 4区物理与天体物理 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Journal of Molecular Spectroscopy Pub Date : 2023-05-01 DOI:10.1016/j.jms.2023.111792

Dmitriy S. Makarov, Evgeniy A. Serov, Tatyana A. Galanina, Aleksandra O. Koroleva, Mikhail Yu. Tretyakov

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Abstract

The intensity of the atmospheric diagnostic fine-structure line of the O $_{2}$ molecule at 118.75 GHz is revised based on multiple measurements with a resonator spectrometer in pure O $_{2}$ and O $_{2}$ –N $_{2}$ mixture at pressures ranging from 250 to 1500 Torr and temperatures within 278–327 K. The resulting intensity of 1.000(3) $\cdot 1 0^{- 25}$ cm/molec confirms the earlier measurements and allows decreasing the uncertainty down to $\sim$ 0.3%. An excellent agreement with the result of calculations presented in HITRAN is demonstrated, suggesting that the 10%–20% uncertainty recommended by the database for all fine structure lines is too large.

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分子氧118GHz线路强度修正

在250 ~ 1500 Torr的压力和278 ~ 327 K的温度条件下，利用谐振光谱仪对O2和O2 - n2混合物进行了多次测量，修正了118.75 GHz O2分子大气诊断精细结构线的强度。得到的强度为1.000(3)⋅10−25 cm/molec，证实了先前的测量结果，并将不确定度降低至~ 0.3%。与HITRAN中给出的计算结果非常吻合，表明数据库推荐的10%-20%的不确定度对于所有精细结构线来说太大了。

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来源期刊

Journal of Molecular Spectroscopy 物理-光谱学

CiteScore

2.70

自引率

21.40%

发文量

审稿时长

29 days

期刊介绍： The Journal of Molecular Spectroscopy presents experimental and theoretical articles on all subjects relevant to molecular spectroscopy and its modern applications. An international medium for the publication of some of the most significant research in the field, the Journal of Molecular Spectroscopy is an invaluable resource for astrophysicists, chemists, physicists, engineers, and others involved in molecular spectroscopy research and practice.

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