Line Mixing and Broadening in the RamanQBranch of HD at 304.6 K

Spectral analysis of H2O near 7180 cm–1 to accurately measure trace moisture in N2 gas: evaluation of line shape profiles using Akaike Information Criterion

“…At high pressure like atmospheric pressure, it is often necessary to consider the dispersion asymmetry of the line shape profile caused by the collisional line mixing effects. [40][41][42][43] We attempted an analysis using the SDAVP, which is a modified SDVP that considers the dispersion asymmetry. In the analysis, we assumed ( )…”

Comparison between theoretical calculations and high-resolution measurements of pressure broadening for near-infrared water spectra

“…It is likely that one must use profiles that incorporate both Dicke-narrowing and the speed-dependent effects in order to obtain a linear dependence of the collisional narrowing parameter with pressure over a wide pressure range. Moreover, additional subtle line shape effects that cause line asymmetry, such as correlations between velocity-changing and dephasing collisions [57][58][59] or line mixing [60,61] could be investigated and quantified if the contribution of the speed-dependence of collisional parameters to the line shape formation were precisely known for the transitions investigated here. [2,3] c ESA databases.…”

Hydrogen Raman linewidths in supercritical water and carbon dioxide

“…This is because the reorientation broadening originates from an interruption in the radiation field of a specific transition and contains cross terms unique to that pair of levels. 17 The precision of the experimental results in this paper is limited by the difficulties associated with spectroscopy in supercritical water and is insufficient to accommodate models with many parameters. The exponential gap law (EGL) 25 and modifications of it 26,27 have been generally successful, but not absolutely complete when high-precision data are considered.…”

“…Sinclair et al 10 and Sheldon et al 17 made measurements in D 2 and HD where an asymmetric contribution to the otherwise Lorenztian lineshape due to line mixing could be determined. The lower signal-to-noise ratio in the data and the greater energy separation in the H 2 lines prevented the determination of this lineshape parameter in this work.…”