The photoelectric effect can only take place with electrons in the K and L shells.
	Lead is a great absorber of x-rays.
Lead is a great absorber of x-rays.
	The probability of photoelectric absorption depends on the p…
The probability of photoelectric absorption depends on the photon energy.
	Photoelectric effect is the predominant x-ray interaction in…
Photoelectric effect is the predominant x-ray interaction in the field of radiation therapy. 
	Compton interactions are independent of atomic number.
Compton interactions are independent of atomic number.
	The threshold energy of pair production is 1.02 MeV.
The threshold energy of pair production is 1.02 MeV.
	What are the three different types of Compton scatter?
What are the three different types of Compton scatter?
	Neutrons are indirectly ionizing.
Neutrons are indirectly ionizing.
	What represents the mass attenuation coefficient?
What represents the mass attenuation coefficient?
	As the filter thickness increases, the average energy of the…
As the filter thickness increases, the average energy of the transmitted beam increases.