Open AccessThe Time-dependent Problem of the Line Radiation Reflection
Author(s) -
A. G. Nikoghossian
Publication year - 2021
Publication title -
communications of the byurakan astrophysical observatory
Language(s) - English
Resource type - Journals
ISSN - 2579-2776
DOI - 10.52526/25792776-2021.68.1-32
Subject(s) - scattering , reflection (computer programming) , line (geometry) , neumann series , physics , radiation , series (stratigraphy) , function (biology) , photon , mathematical analysis , optics , computational physics , mathematics , geometry , computer science , paleontology , evolutionary biology , biology , programming language
We consider the classical time-dependent problem of diffuse reflection of the line-radiation from a semi-infinite absorbing and scattering atmosphere. By the example of the simplest 1D problem it is shown how its solution is constructed in the general case, when both the photon lifetime in the absorbed state and the time of its travel between two consecutive acts of scattering are taken into account. The numerical values of the coefficients in the expansion of the reflection function in the Neumann series are given. The obtained solution is applied to the problem, in which the scattering in both the spectral line and in the continuous spectrum is taken into account.