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Forum: Electromagnetic Processes
Re: Question simulating X-ray spectra from low energy electrons
Date: Jun 19, 03:46
From: Paul Nicholas Colin Gloster <Paul Nicholas Colin Gloster>

On Fri, 19 Jun 2009, David Roet wrote:
|------------------------------------------------------------------------|
|"I am comparing the results of different Monte Carlo codes to simulate  |
|X-ray spectra from low energetic electrons (30 keV) impinging onto an   |
|infinitely thick slab of material."                                     |
|------------------------------------------------------------------------|

Hello,

Which other codes are you tring and which have worked better?

|------------------------------------------------------------------------|
|"The problem I have with GEANT4.9.2p02 is that the ratio of             |
|characteristic K X-ray line intensities to the bremsstrahlung continuum |
|is too low when compared to experimental results. My target material is |
|Copper (Cu) and the ratio is too low by a factor > 10+.                 |
|                                                                        |
|So my question is if this is "normal", because of the low energy/models,|
|or have I done something wrong in my code? I have tried both the        |
|standard and low energy models, but the results don't differ much from  |
|each other."                                                            |
|------------------------------------------------------------------------|

Maybe you could try G4LECS (
HTTP://public.LANL.gov/mkippen/actsim/g4lecs/
) but it is supposed to give very similar results to GEANT4.9.2.

|------------------------------------------------------------------------|
|"Another, somewhat related, question is that for scoring the X-ray      |
|spectrum I store the X-ray energy and track weight:                     |
|                                                                        |
|[..]"                                                                   |
|------------------------------------------------------------------------|

I have no advice re the weight.

Regards,
Nicholas Paul Collin

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