Question

Regarding the photoelectric effect:

a. It results in the production of Bremsstrahlung radiation

b. It results in the production of scattered photons, the energy of which is dependent on the initial photon energy (keV)

c. X-rays passing through barium cause greater scatter than those passing through human tissues

d. Ejection of a K-shell electron by an incident photon results in the production of an Auger electron

e. Auger electrons are produced as an indirect result of photoelectric radiation

Answer 1

a. False. The photoelectric effect involves an incident photon removing a bound electron from its shell, resulting in the **** created being filled by electrons from outer shells, causing the emission of characteristic radiation.

b. False. Unlike the Compton effect, the energy of the incident photon is completely absorbed after colliding with the electron and the photon disappears, resulting in no scatter photons.

c. True. Barium has a higher atomic number than human tissue and therefore produces characteristic radiation as a result of the photoelectric effect, with sufficient energy to exit the patient and act as scatter.

d. False. Ejection of the electron results in the production of characteristic radiation and an ejected electron (called a photo electron).

e. True. The characteristic radiation produced as a result of the photoelectric effect is absorbed almost immediately in material with a low atomic number, resulting in the ejection of a further low-energy electron (Auger electron).