# How to understand band stucture in process of radiation absorption?

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I try to understand the process of radiation absorbtion by the crystal. Something still not clear for me, when I consider band structure.

Let imagine, that electron has relaxed and it's energy is close to the energy of the conduction band bottom, which has some number of equal local minimums at different special points. How can I understand, in which of this minimum will fall electron and what is the logic behind this?

Thanks

asked Dec 31, 2018

the keyword is "distribution". However the question is broad, there are many emergent theories and some of them use conveniently quantum and paths integration.

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