Extension of Radiative Transfer Coherent Backscattering RT-CB code to dense 
discrete random media

Markkanen, J.; Penttilä, A.

doi:10.1016/j.jqsrt.2023.108733

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Extension of Radiative Transfer Coherent Backscattering RT-CB code to dense discrete random media

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Markkanen, J.
Planetary Science Department, Max Planck Institute for Solar System Research, Max Planck Society;

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https://ui.adsabs.harvard.edu/abs/2023JQSRT.31008733M
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Citation

Markkanen, J., & Penttilä, A. (2023). Extension of Radiative Transfer Coherent Backscattering RT-CB code to dense discrete random media. Journal of Quantitative Spectroscopy and Radiative Transfer, 310, 108733. doi:10.1016/j.jqsrt.2023.108733.

Cite as: https://hdl.handle.net/21.11116/0000-000E-8001-F

Abstract

The Radiative transfer coherent backscattering (RT-CB) code is extended to apply to dense discrete random media of optically soft spherical particles. This is achieved by utilizing the well-known static-structure-factor (SSF) correction derived from the Percus-Yevick approximation for sticky-hard-sphere (SHS) pair correlation function. The code is verified against the numerically exact electromagnetic method for small spherical media consisting of submicrometer-sized icy particles at optical wavelengths. The SSF-corrected RT-CB method significantly improves solution accuracy, and the solution agrees well with the numerically exact solution when the packing density is less than 20% and particles are optically soft, i.e., the refractive index of particles is close to that of the background medium.