[Gate-users] Energy deposited by Compton interaction

[Guillem Pratx]

Dear Anayisse,

The Compton interaction does not directly create light photons in the
crystal - for this reason the energy detected is zero for "compt". The
light is generated by the recoil electron as it bounces again other
electrons and creates a track of excited electrons. The energy for the
Compton needs to be read from the next line in the Hits file that says
electron ionization or "iIoni"

Guillem

anayisse arnaud wrote:
> Dear Gate users,
>
> I hope you can help me explain these results : I have always the energy deposited by Compton interaction = 0 , it's impossible .... !! 
> can you help me understand why ?
>
> Here some lines from the gateHits.dat file after a very simple PET scanner simulation :
>
>        0       4   2   0     0    98     0     0     0     0   4.80830738641700296894139e-05  0.000e+00  5.900e+00  5.387e+00 -6.378e+01 -8.914e+00      22     2     0   1    0    0 compt NULL NULL
>        0       4   2   0     0    98     0     0     0     0   4.80830738648918237332190e-05  2.890e-03  1.164e-04  5.387e+00 -6.378e+01 -8.914e+00      11     3     2   1    0    0 eIoni NULL NULL
>        0       4   1   0     0   930     0     0     0     0   4.80830725456377712154210e-05  0.000e+00  5.505e+00 -5.354e+00  6.339e+01  8.859e+00      22     1     0   2    0    0 compt NULL NULL
>        0       4   1   0     0   930     0     0     0     0   4.80830725460870645956990e-05  1.033e-02  8.112e-04 -5.354e+00  6.339e+01  8.859e+00      11     4     1   2    0    0 eIoni NULL NULL
>        0      15   2   0     0   509     0     0     0     0   1.75863105737611002260534e-04  0.000e+00  5.199e+00  5.937e+01 -9.981e+00 -2.245e+00      22     2     0   1    0    0 compt NULL NULL
>        0      15   2   0     0   637     0     0     0     0   1.75863124194323804235993e-04  5.024e-02  1.904e+00  5.555e+01 -7.918e+00  1.178e+00      22     2     0   1    0    0 phot NULL NULL
>        0      15   2   0     0   637     0     0     0     0   1.75863124237332288379854e-04  1.345e-01  5.869e-02  5.554e+01 -7.914e+00  1.184e+00      11     4     2   1    0    0 eIoni NULL NULL
>        0      15   2   0     0   509     0     0     0     0   1.75863105817652010803842e-04  6.486e-02  3.775e-02  5.940e+01 -9.974e+00 -2.234e+00      11     3     2   1    0    0 msc NULL NULL
>        0      15   2   0     0   509     0     0     0     0   1.75863105916834852647870e-04  2.614e-01  1.659e-01  5.941e+01 -9.980e+00 -2.217e+00      11     3     2   1    0    0 eIoni NULL NULL
>        0      23   2   0     0   244     0     0     0     0   2.79542904503920954916579e-04  0.000e+00  1.361e+00  4.617e+01 -3.233e+01 -5.875e+00      22     2     0   1    0    0 compt NULL NULL
>        0      23   2   0     0   374     0     0     0     0   2.79542924092678708378190e-04  5.024e-02  1.776e-01  5.034e+01 -2.825e+01 -5.234e+00      22     2     0   1    0    0 phot NULL NULL
>        0      23   2   0     0   374     0     0     0     0   2.79542924143725331903587e-04  2.290e-01  1.359e-01  5.035e+01 -2.824e+01 -5.231e+00      11     4     2   1    0    0 eIoni NULL NULL
>
>
>
> Thank you very much
>
> Anayisse
> _________________________________________________________________
> Express yourself instantly with MSN Messenger! Download today it's FREE!
> http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/_______________________________________________
> Gate-users mailing list
> Gate-users at lists.healthgrid.org
> http://lists.healthgrid.org/mailman/listinfo/gate-users
>
>