Diffusion approximation in the theory of radiative transfer |
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| Authors: | Jun Feng Chen Jun Han You |
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| Institution: | (1) Department of Applied Physics, Jiaotong University, Shanghai, China;(2) Center for Astrophysics, University of Science and Technology of China, Hefei, China |
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| Abstract: | The transfer process of hard X-ray radiation passing through a  cold plasma is studied in this paper under the diffusion approximation. We call such a particular transfer process a down-Comptonization. A diffusion equation describing this process is derived and its potential applications in astrophysics and radiation physics are also pointed out. |
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