|Message: Re: Proton nuclear reaction in micrometer silicon box||Not Logged In (login)|
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On Mon, 23 Nov 2015 02:23:11 GMT, jeonyboy wrote:
> Hello, I am relatively new programmer trying to simulate 40 MeV proton > beam on a square box with length of 1 um made up of silicon. > > I am trying to get following informations: > > 1. Total energy deposited 2. All secondary particles produced and their > energies > > I have been using the Hadr06 example code from Extended examples with > modified detectormessenger file. > > My question is, when I simulate at length of 1mm for example, I get > secondary particles produced such as alpha, proton, gamma, and other > elements but at 1 um length I seem to get almost no secondary particles > produced and only some with over 10,000 protons fired. > > Can a experienced user confirm for me these results is correct or if I > should modify the code for more accurate results. > > Any help or input would be great. Thank you. >
You may run Hadr03 with attached macro. From the output, I read :
The run is 10000 proton of 40 MeV through 10 m of G4_Si (density: 2.33 g/cm3 )
Process calls frequency: protonInelastic= 10000
MeanFreePath: 31.637 cm +- 31.145 cm massic: 73.714 g/cm2 CrossSection: 0.031609 cm^-1 massic: 1.3566 mm2/g
which means 0.0316 interactions per cm and per incident proton.
I let you compute the number of interactions in 1 mm and in 1 um.
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