{"title":"Collisional parameters of the pure rotational R(0) line of CO in N2: Experiment versus theory","authors":"D.S. Makarov, I.N. Vilkov, T.A. Galanina, E.A. Serov, M.A. Koshelev, M.Yu. Tretyakov","doi":"10.1016/j.jqsrt.2025.109379","DOIUrl":null,"url":null,"abstract":"<div><div>Line shape of the first rotational transition of the CO molecule perturbed by N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> collisions was studied beyond the traditional Voigt profile at pressures from 0.1 up to 1500 Torr and temperatures from 238 up to 353 K using two different spectrometers with complementary abilities. Line intensity, shifting, mixing, broadening, and underlying continuum coefficients were retrieved. The experimental speed dependence (SD) broadening parameters and their temperature dependence were compared to the results of the recent quantum scattering calculations showing fair agreement yet pointing to possible necessity of improvement of the theoretical approach to the CO–N<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> collisional system.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"337 ","pages":"Article 109379"},"PeriodicalIF":2.3000,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Quantitative Spectroscopy & Radiative Transfer","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S002240732500041X","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Line shape of the first rotational transition of the CO molecule perturbed by N collisions was studied beyond the traditional Voigt profile at pressures from 0.1 up to 1500 Torr and temperatures from 238 up to 353 K using two different spectrometers with complementary abilities. Line intensity, shifting, mixing, broadening, and underlying continuum coefficients were retrieved. The experimental speed dependence (SD) broadening parameters and their temperature dependence were compared to the results of the recent quantum scattering calculations showing fair agreement yet pointing to possible necessity of improvement of the theoretical approach to the CO–N collisional system.
期刊介绍：
Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer:
- Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas.
- Spectral lineshape studies including models and computational algorithms.
- Atmospheric spectroscopy.
- Theoretical and experimental aspects of light scattering.
- Application of light scattering in particle characterization and remote sensing.
- Application of light scattering in biological sciences and medicine.
- Radiative transfer in absorbing, emitting, and scattering media.
- Radiative transfer in stochastic media.
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