Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 38, Problem 7P
To determine

The fractional energy uncertainty in the alpha particle energy ΔE/E.

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(II) A radioactive element undergoes an alpha decay with a lifetime of 12 us. If alpha particles are emitted with 5.5-MeV kinetic energy, find the percent uncertainty AE/E in the particle energy.
Gamma rays of energy E, =14.4 keV are emitted when "Fe nuclei make trapsition from the first excited state to the ground state. The lifetime ofthis excited state is about 3x10's. If the spread in the energy of the excited state is written as AE =-E, find the value of v. Here c is the speed of light in vacuum.
K:43) Assuming only maximum energy transfers occur for 12C ions with electrons in a material, determine the number of collisions required for a 100 MeV 12C ion to go to energy below 10 MeV.

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Physics for Scientists and Engineers with Modern Physics

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