Line-shape parameters and line mixing for the low-intensity high-J oxygen transitions. Issue 1 (1st January 2023)

• Record Type: Journal Article
• Authors: Domysławska, Jolanta; Wójtewicz, Szymon; Bielska, Katarzyna; Masłowski, Piotr; Cygan, Agata; Słowiński, Michał; Bilicki, Sławomir; Trawiński, Ryszard S; Ciuryło, Roman; Lisak, Daniel
• Is Part Of: Journal of physics. Volume 2439:Issue 1(2023)
• Publication Date: 2023-01-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2439/1/012018
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We present the results of investigations of the oxygen B-band R-branch transitions with intensities in the range from 1.5 × 10 −26 to 2.5 × 10 −28 cm −1 /(molecule/cm 2 ) and the total angular momentum quantum number for the lower state, J ", up to 38. High resolution CRDS laboratory spectra were fitted with the Voigt profile as well as with advanced line-shape functions consistent with the Hartmann–Tran profile, that is the speed-dependent Voigt profile and speed-dependent Nelkin–Ghatak profile using the multispectrum fitting technique. The line positions, line intensities and other line-shape parameters, together with our previous data, were collated to show trends for the whole R branch. Using the determined frequencies of the B-band transitions, the Dunham fit was performed to obtain spectroscopic parameters for both ground and excited states. Newly recorded spectra at the band head, with the signal-to-noise ratio above 20000, were analyzed with line profiles including also the line mixing. First-order line mixing determined directly from the line shape fitting at relatively low pressure (32 Torr) is in good agreement with values calculated by Sung et al . [1].