Measurement of the absorption cross sections of unstable CS based on the dynamic equilibrium of CS2 and CS in the photolysis of CS2. (March 2020)

• Record Type: Journal Article
• Authors: Zhang, Yungang; Wang, Yongda; Liu, Yunjie; Ai, Xinyu; Zhang, Zhiguo; Li, Jimeng
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 243(2020)
• Publication Date: 2020-03
• Subjects: Carbon monosulfide -- Carbon disulfide -- Absorption cross sections -- Photolysis; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2020.106836
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: A method for measuring absorption cross sections of unstable CS is proposed. The experimental device for measuring the CS concentration is designed. Different concentrations of CS are obtained by the photolysis of CS2 . The absorption cross sections of CS are provided for the first time. Abstract: The absorption cross sections, as important spectroscopic data, can be used for the identification and quantitative measurement of components. However, in view that carbon monosulfide (CS) is unstable and highly reactive, it is difficult to measure the absorption cross sections of CS. Therefore, a method for measuring absorption cross sections of CS based on the dynamic equilibrium between carbon disulfide (CS2 ) and CS in the photolysis CS2 is proposed in the paper, and the absorption cross sections of CS are obtained for the first time. Firstly, the method for evaluating CS2 concentrations is introduced, and the calculation formula of CS2 concentrations is given. Secondly, CS2 is converted to CS by increasing the intensity of incident light. Factors affecting CS2 conversion efficiency, such as the flow rate of CS2 and the intensity of incident light, are studied. Next, according to the conversion relationship between CS2 and CS, the CS concentration has been obtained by measuring the change of CS2 concentration. Finally, the CS absorption cross sections of (0.29 ± 0.01) × 10 −16 cm 2 /molecule and (2.15 ± 0.04) × 10 − 16 cm 2 /molecule are provided at wavelengths of 250.88 nm and 257.60 nm, respectively.