Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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A NaI(Tl) detector is coupled to a photomultiplier tube having certain stages for electron
multiplication. This detection system is used to detect g-rays of 1115 keV. The output
circuit of photomultiplier has a capacitance of 250 pF. The average electron multiplication
at each stage is 3. Assume light collection efficiency is unity, photocathode efficiency is
0.12 and 300 Ev energy is needed to create one photon and the amplitude of output pulse
is 0.25 V. Find the number of multiplication stages in the photomultiplier?
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