00:01
Hello students, optimal design parameters of an x -ray detector.
00:06
What an x -ray detector does is, the x -ray is ejected and incident on this detector.
00:21
So it stimulates the photons.
00:24
X -rays are energy particles.
00:27
It stimulates electron hole pairs.
00:29
Electron hole pairs are generated.
00:32
These electron hole pairs are converted into electrical signals.
00:38
These signals will be evaluated to understand how many neutron x -rays have incident in this situation.
00:49
Coming back to the quantum efficiency of the x -ray detector.
00:53
This is the measure of how efficiently it can convert the incident x -ray photons into detectable signals.
01:02
Quantum efficiency will be equal to n number of hole electron pairs divided by number of incident photons.
01:13
That is the quantum efficiency.
01:16
Electron hole pairs produced can be related to the number of incident photons and thickness.
01:24
The attenuation constant alpha can be used to measure the intensity of the incident photons.
01:30
We can use beer -lambert law...