Experimental study on combustion-driven hydrogen bromide (HBr) chemical laser

Wang, Zengqiang; Duo, Liping; Jin, Yuqi; Tang, Shukai; Zhou, Danhong; Li, Liucheng; Yu, Haijuan; Wang, Yuanhu; Cao, Jing; Sang, Fengting

doi:10.1117/12.2524578

Cited by 1 publication

(1 citation statement)

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“…1 To understand and effectively control these processes, modeling the HBr-based plasmas is essential, where the dynamic parameters of HBr, including its cross sections and oscillator strengths, are necessary input data. HBr is also of great importance in the fields of astrophysics, 4 atmospheric chemistry, 5 chemical laser system, 6 etc. For example, HBr contributes to atmospheric pollution and is involved in the mechanism of ozone depletion.…”

Section: ■ Introductionmentioning

confidence: 99%

Oscillator Strengths and Cross Sections of the Valence-Shell Excitations of HBr Studied by Fast Electron Impact

Zhu,

Wang,

Nie

et al. 2023

J. Phys. Chem. A

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The oscillator strengths and cross sections of the valenceshell excitations of HBr were determined by fast electron scattering with an incident electron energy of 1500 eV and an energy resolution of 80 meV. The momentum transfer dependence behaviors of the generalized oscillator strengths have been used to elucidate the transition characteristics. The present results show that the strong spin−orbital interaction results in the observation of some triplet states in the (Λ, S) coupling and the constant generalized oscillator strength ratios for the pair states with the same electronic configuration and quantum number Ω, and the quantitative spin−orbit coupling coefficients of b 3 Π 1 (v = 0) and C 1 Π(v = 0) are determined. The optical oscillator strengths of the valence-shell excitations were obtained by extrapolating the generalized oscillator strengths to the limit of zero squared momentum transfer. The present optical oscillator strengths give an independent cross-check of the previous experimental and theoretical results, and the comparison shows that the line-saturation effect is more severe for the high Rydberg states with large intensities and narrow natural widths. The integral cross sections of the valence-shell excitations of HBr were obtained from the excitation threshold to 5000 eV by the BEscaling method. The present oscillator strengths and cross sections supplement the fundamental molecular database of HBr and can be used for modeling in the semiconductor industry, astrophysics, and atmospheric chemistry.

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Section: ■ Introductionmentioning

confidence: 99%