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Question Fluorescence from aluminium - output different to expected values. Why? 

Keywords: fluorescence, accuracy
Forum: Physics List
Date: 16 Feb, 2007
From: David <davidhall101@hotmail.com>

I'm a first year PhD student and I'm using geant4 for the first time,
so apologies if anything asked here is obvious!

I'm trying to test my simulation and am running a test to check that
fluorescence is working as expected.  So far I am receiving the following
KE data from gammas off aluminium:

Energy (keV)    Counts    CreatorProcess
=============================================
 1.46917	 1480	   LowEnPhotoElec
 1.4687	         3104	   LowEnPhotoElec
 1.54502	 8	   LowEnPhotoElec
 1 .54503	 22	   LowEnPhotoElec

(Aluminium has Kalpha1 = 1.487 keV
               Kalpha2 = 1.486 keV
               Kbeta1  = 1.553 keV)

My problems are as follows:

1.  I am using the physics list from the X-ray telescope example.  I don't
really know how to turn fluorescence on or off (or auger, although I
think that that is on as it says so in the cmd window).  Will fluorescence
be included in the LowEnPhotoElec or do I need to specify it is true?

2.  To what accuracy should I be expecting output data to match the
expected data values?  I know that geant4 is made for particle
physicists, so a few eV here or there is no problem, but I would like
to be able to resolve the Kalpha1 and Kalpha2 lines and, as they don't
really match up (and I am not certain that they are fluorescence) I
don't really know how to do this?

Many thanks to anyone who can help!

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1 None: Re: Fluorescence from aluminium - output different to expected values. Why?   (Shyama - 27 Feb, 2007)
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