College Physics (10th Edition)
College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 29, Problem 25P
To determine

Find the number of electrons excited from valence band to conduction band.

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A germanium diode is used to detect radiation with energy of 1.6 MeV. To do so, the anode (positive terminal) is exposed to the incoming radiation. Assume that the energy is absorbed entirely at the point of entry or the anode. With mobilities of 1,150 cm?/V.s for holes and 3,750 cm?/V.s for electrons, calculate the current through the diode with reverse bias: V = 24 V and d = 12 mm. Neglect the effects of electrodes and 4. of the n and p layers and assume a single radiation event, that is a single particle or a short burst of radiation. (Charge of an electron = 1.602 x 10-19 C; d is the distance between anode and cathode).
The gap between valence and conduction bands in diamond is 5.47 eV.What is the maximum wavelength of a photon that can excite an electron from the top of the valence band into the conduction band? In what region of the electromagnetic spectrum does this photon lie?
The gap between valence and conduction bands in diamond is 5.47 eV. (a) What is the maximum wavelength of a photon that can excite an electron from the top of the valence band into the conduction band? In what region of the electromagnetic spectrum does this photon lie? (b) Explain why pure diamond is transparent and colorless. (c) Most gem diamonds have a yellow color. Explain how impurities in the diamond can cause this color.
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