Topic 27 Flashcards
1
Q
Describe the attenuation of x-rays in matter
A
Intensity decreases similarly to that of light
2
Q
Eqaution showing the attenuation of X-rays
A
I = I0e-µx
- x = Thickness*
- µ = Attenuation coefficient*
3
Q
Equation to calculate the mass-attenuation coefficient
A
µm = µ/ρ
4
Q
Describe the attenuation coefficient
A
Depedns on both the material of the medium and the energy of the x-ray
5
Q
Describe the photoeffect
A
The ray hits an electron of an inner shell.
6
Q
What is pair production?
A
The photon becomes an electron and a positron
