Gamma detection -- Cherenkov radiation in gamma-scintillator interaction

[ORF]

Hello

During a simulation of light in gamma-scintillator interaction, it seems that there are a lot of Cerenkov photons. I don't know their contribution to the final intensity (it will need a long time to compute it).

The textbooks usually say that the gamma ray will produce secondary electrons, and at the end the pair electron-hole will recombine through an intermediate level and this will produce the scintillation light.

So, the question is: how much these Cerenkov photons contribute to the final intensity of the scintillation light?

It seems that Cerenkov photons produced by gamma rays are being used in medical imaging
https://en.wikipedia.org/wiki/Chere..._radioisotopes_and_external_beam_radiotherapy

Thank you for your time.

Regards,
ORF

 

[Vanadium 50]

How long is a piece of string?

Your answer depends on the construction of the detector and its readout.

 

[ORF]

Hello.

Thanks for answering :)

The detector is a piece of inorganic crystal (NaI:Ce I think). The light is collected by a pixelized Si-PMT.

Regards.

 

[Vanadium 50]

I should have said "your answer depends on the details of construction of the detector and its readout." Answering your question without a detailed design is impossible: for example, scintillation light and Cerenkov light have different wavelengths, so they have different attenuation lengths and different PMT responses. This all has to be accounted for.