When I use this method called transportphoton() in gas medium, I found that when the energy of photon is greater than 1 Mev, there is very little number of generated electron.
What is the Energy range of photon Garfield++ applicated?
What else method can apply the energy of photon is greater than 1 Mev?
Wait to your reply .Thanks a lot!
Beyond the K shell edge, the photoabsorption cross-section decreases quite fast and at 1 MeV (depending on the size of your gas volume of course) the probability for photon to interact via photo absorption inside the gas medium becomes small.
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