* The probability that an electron in a silicon crystal lies in the conduction band at temperature t
* The probability that an electron in a silicon crystal lies in the conduction band at temperature t
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* The rate of scattering, or the average amount of time that is required for an electron to impact a silicon nucleus, redistributing energy randomly among the two entities.
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* The rate of scattering, or the average rate at which a valence band electron scatters by hitting a defect or a phonon in the silicon crystal