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A γ-ray which has energy of 400 keV collides with an atom and undergoes Compton scattering....

A γ-ray which has energy of 400 keV collides with an atom and undergoes Compton scattering.

(a) What is the energy of the wave in Joules and hence what is its frequency?

(b) If the change in the angle of the γ-ray is 20°, what is the frequency of the wave as it exits the atom?

In Aluminium, the attenuation of a γ-ray is described by the attenuation coefficient μ=0.25 cm-1. What are the values for the following:

(c) The relaxation length

(d) The half value thickness

(e) The amount of attenuation of 3 cm of Aluminium, assuming the buildup factor is 1.

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