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Forum: Particles
Re: Question Particle Fluence
Re: None Re: Particle Fluence (michel maire)
Re: None Re: Particle Fluence
Date: 27 Sep, 2016
From: michel maire <michel maire>

On Mon, 26 Sep 2016 05:20:26 GMT, jeonyboy wrote:
> Hi thanks for your reply, you've been huge help for me on geant4 issues.
> I have few questions though on your answer.
> First, does it have to be a sphere? Most of my simulations is for a chip
> that is rectangular in shape. What I tried to do is for example run my
> modified hadr06 example for proton energy such as 57 MeV in 1 um^3
> silicon box.
> I do beamOn for 1,000,000. After, I gather how many cases there were
> that deposit above a specific energy; for example, 2600 cases out of 1
> million where it deposits more than 0.037 MeV energy.
> So then my calculation for upset cross section will be 2600/flux which I
> did as 2600/1,000,000/1um^2 which comes out to 2.588e+13 barn.
> Am I correct in this because the data is off by 2 orders compared to
> experiment data that I have.

 You can check cross sections with Hadr03 (macro attached).
 What you will get : 

 The run is 100000 proton of 57 MeV through 10 m   of G4_Si (density: 2.33 g/cm3 )

 Process calls frequency:
	hadElastic= 57979	protonInelastic= 42021

 MeanFreePath:	16.374 cm  +- 16.392 cm 	massic: 38.152 g/cm2 
 CrossSection:	0.061071 cm^-1 		massic: 2.6211 mm2/g 
 crossSection per atom:	1.2224 barn  

 Verification: crossSections from G4HadronicProcessStore:
          hadElastic= 1.5221 mm2/g 	709.86 mbarn 
     protonInelastic= 1.1021 mm2/g 	514 mbarn 
               total= 2.6242 mm2/g 	1.2239 barn  


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