What Is Detection Efficiency in HPGe Detectors?

AI Thread Summary
Detection efficiency in high purity germanium (HPGe) detectors refers to the percentage of gamma-ray photons at a specific energy that are successfully detected. This efficiency is influenced by the ability of the detector to absorb gamma rays, as many can penetrate shielding without being detected. The discussion also touches on the relationship between emission probability and gamma-ray intensity, suggesting they are not the same. While formulas or equations to calculate detection efficiency exist, specific details were not provided in the conversation. The participants express a need for further research to find these equations.
nurul anuar
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hi there!

I am nurul ain,new member here.

I have a question regarding gamma ray detector, the high purity germanium detector or aka HPGe. What is meant by the detection efficiency at specific gamma-ray energy (εγ)? and whether the emission probability of the corresponding gamma-ray energy and the intensities are actually the same thing?

Thank you! Have a nice day!:kiss:
 
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nurul anuar said:
What is meant by the detection efficiency at specific gamma-ray energy (εγ)?

I'd guess that it refers to the percentage of photons at that specific energy that get detected. Since gamma ray photons can penetrate a lot of shielding, I imagine a large portion of them pass through the detectors without being absorbed and detected.
 
I see. You made it clearer now. Thank youu. And is there any ways/formulas/equations that can be used to find the efficiency? Or is it a constant?
 
nurul anuar said:
I see. You made it clearer now. Thank youu. And is there any ways/formulas/equations that can be used to find the efficiency? Or is it a constant?

Oh I'm sure there are. I just have no idea what those might be. :wink:
 
Drakkith said:
Oh I'm sure there are. I just have no idea what those might be. :wink:
Hehe. Guess i have to keep looking then. . Thank youu. Have a nice day!☺️
 

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