### Abstract

The atomic generalized redistribution functions for three-photon processes, derived in the previous paper of this series, are formulated in terms of linear superpositions of newly introduced auxiliary functions q_{I}-q_{VI}, thus extending the traditional formalism of redistribution functions for two-photon processes. The corresponding velocity-averaged laboratory functions Q_{I}-Q_{VI} of these auxiliary functions are derived in both their angle-dependent and angle-averaged forms. Since the expressions found for Q_{I}-Q_{VI} are quite complicated, the so-called disentangled approximation is employed that uses the representative values of the generalized redistribution function at an orthogonal triad of photon directions rather than the angle-averaged function itself. This approximation yields relatively simple expressions which can be used in radiative transfer calculations.

Original language | English (US) |
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Pages (from-to) | 397-406 |

Number of pages | 10 |

Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |

Volume | 37 |

Issue number | 4 |

DOIs | |

State | Published - Apr 1987 |

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### ASJC Scopus subject areas

- Radiation
- Atomic and Molecular Physics, and Optics
- Spectroscopy

### Cite this

*Journal of Quantitative Spectroscopy and Radiative Transfer*,

*37*(4), 397-406. https://doi.org/10.1016/0022-4073(87)90008-2