Message: Re: Proton nuclear reaction in micrometer silicon box Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Proton nuclear reaction in micrometer silicon box 

Forum: Hadronic Processes
Re: Question Proton nuclear reaction in micrometer silicon box
Date: 23 Nov, 2015
From: michel maire <michel maire>

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.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/11/23/14.31-8516-Si.mac.txt

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Proton nuclear reaction in micrometer silicon box   (jeonyboy@gmail.com - 23 Nov, 2015)
(_ None: Re: Proton nuclear reaction in micrometer silicon box   (michel maire - 24 Nov, 2015)
(_ None: Re: Proton nuclear reaction in micrometer silicon box   (jeonyboy@gmail.com - 24 Nov, 2015)
(_ None: Re: Proton nuclear reaction in micrometer silicon box   (michel maire - 25 Nov, 2015)
(_ None: Re: Proton nuclear reaction in micrometer silicon box   (jeonyboy@gmail.com - 26 Nov, 2015)
(_ None: Re: Proton nuclear reaction in micrometer silicon box   (michel maire - 27 Nov, 2015)
 Add Message Add Message
to: "Re: Proton nuclear reaction in micrometer silicon box"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]