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•• As a nuclear particle traverses a particle detector, it creates electron-hole pairs and loses energy. The average energy lost per pair created is 3.1 eV. (This is much bigger than the band gap of 1.1 eV because many of the excited electrons come from deep clown in the valence band, and other processes — like inelastic scattering — take some energy.) A particle with initial kinetic energy of 2 MeV enters the detector and is brought to rest.
(a) How many electron-hole pairs does it create?
(b) What total charge flows around the circuit?
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