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Solve the given problem:

Problem: The gap between valence and conduction bands in silicon is 1.12 eV. A nickel nucleus in an excited state emits a gamma-ray photon with wavelength 9.31 x 10^-4 nm.

Part I: How many electrons can be excited from the top of the valence band to the bottom of the conduction band by the absorption of this gamma ray?

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