Dear Donghyun,
it is true that electrons undergo bremsstrahlung interactions, however -
based on its cross section - this is a discrete process and not
a continuous one.
This means that an electron travelling through a material can emit a
photon (or not emit) with a certain probability.
This probability is linked to the radiation length, which is more than
1 cm in iron.
Since you have a thin sheet, some electrons do not undergo any bremsstrahlung
interaction and they appear in your detector with an energy still close
to the original one.
The peak should decrease, while increasing the thickness of the sheet.
Hope that helps,
best regards,
Ilaria
On 16 Sep 2019, at 10:47, 곽동현 <kwakdh_at_unist.ac.kr<mailto:kwakdh_at_unist.ac.kr>> wrote:
Dear experts,
I'm trying a simple fluka simulation by using flair.
I am trying to simulate a 0.5GeV electron beam on a 0.5mm thick sheet, but the results are not understood for me.
<image.png>
As shown in the attached file, an electron energy pick is generated at 500 MeV.
<image.png>
In my opinion, bremsstrahlung cannot be avoidable, because electrons are charged particles. Therefore, the energy pick of electrons should be generated in low energy then 500MeV.
Am I'm missing something?
Thank you.
Best regards,
Donghyun Kwak.
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Received on Wed Sep 18 2019 - 23:53:02 CEST