Revisiting N 2-N 2 collisional linewidth models for S-branch rotational Raman scattering

This paper presents an evaluation of two commonly accepted Raman linewidth models typically used to fit CARS model parameters to data; the Modified Exponential Gap (MEG) and the Energy Corrected Sudden (ECS) models. The adjustable parameters in each model have been fit to published experimental linewidths, and comparisons are made to the various publications that have already provided similar adjustable constants. The approaches presented in the literature are discussed as are differences with the findings presented here.Crown Copyright (c) 2021 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.

Automated summary

This paper evaluates two commonly accepted Raman linewidth models, MEG and ECS, used to fit CARS model parameters and compares them to previous publications. The approaches presented in the literature are discussed along with the differences found in this study.