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1. A typical energy spectrum is shown opposite with typical
features due to interactions in the shielding. Complete the
labeling exercise to be
sure that you can recognise the various features of an energy
spectrum. |
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2. A gamma-ray photon has an energy of 287 keV after Compton
scattering through an angle of 120°. What was its energy before
scattering:
No, this is not correct.
No, this is not correct.
Yes, this is correct.
3. Calculate the energy of a recoil electron if a 1173 keV gamma-ray
photon is Compton
scattered through 60º:
No, this is not correct.
No, this is not correct. This is the energy of the
gamma-ray, not the recoil electron.
Yes, this is correct.
4. Calculate the backscattered peak energies corresponding to
incident gamma-rays of 898, 1332 and 1836 keV:
No, this is not correct.
No, this is not correct.
Yes, this is correct. Backscattered gamma-rays have an energy of approximately 200 -300 keV.
This is independant of their initial energy.
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