Sketch and describe a photoelectric interaction.                   

·        Describe what happens to the energy of a photon that undergoes a photoelectric interaction.

·        Discuss the concept of linear attenuation coefficient. Identify the units.

·        Discuss the concept of mass attenuation coefficient. Identify the units.

·        Describe the characteristics of a material that affect the probability of photoelectric interactions.

·        Describe the relationship between the probability of photoelectric interactions and photon energy.

·        Identify the electrons that are usually involved in photoelectric interactions.

·        Sketch a K-edge and explain what determines its energy.

·        Describe a Compton interaction.                  

·        Describe what happens to the energy of a photon in a Compton interaction.

·        Describe the characteristics of a material that affect the probability of Compton interactions.

·        Describe the relationship between the probability of Compton interactions and photon energy.

·        Identify the electrons that are usually involved in Compton interactions.

·        Discuss the factors that determine the amount of energy lost by photons in a Compton interaction.

·        Discuss what determines the angle of scatter in a Compton interaction.

·        Describe the factors that determine if photoelectric or Compton is the most predominant type of interaction.

·        Describe conditions (material characteristics and photon energy) that contribute to a high probability of photoelectric interactions. 

·        Describe conditions (material characteristics and photon energy) that contribute to a high probability of Compton interactions.

·        Sketch a graph showing the relationship between mass attenuation coefficient values and photon energy (0-100keV range) for soft tissue and iodine.