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None Geant4 Gaussian Energy distribution vs hand coded Gaussian 

Forum: Particles
Date: 13 Dec, 2017
From: Tim Fulcher <Tim Fulcher>

Hi all

I was experimenting with coding my own Gaussian energy distribution:

/gps/ene/type Arb
/gps/hist/type arb
/gps/hist/point 235.0 0.0001659
/gps/hist/point 236.0 0.0003825
/gps/hist/point 237.0 0.0008496
/gps/hist/point 238.0 0.001824
/gps/hist/point 239.0 0.003808
/gps/hist/point 240.0 0.007732
/gps/hist/point 241.0 0.01527
/gps/hist/point 242.0 0.02933
/gps/hist/point 243.0 0.0548
/gps/hist/point 244.0 0.09957
/gps/hist/point 245.0 0.1759
/gps/hist/point 246.0 0.3017
/gps/hist/point 247.0 0.4966
/gps/hist/point 248.0 0.7588
/gps/hist/point 249.0 0.9857
/gps/hist/point 250.0 1.0000
/gps/hist/point 251.0 0.7239
/gps/hist/point 252.0 0.3516
/gps/hist/point 253.0 0.1101
/gps/hist/point 254.0 0.02166
/gps/hist/point 255.0 0.00264
/gps/hist/inter Lin

and comparing them to the default Gaussian distribution:

/gps/ene/type Gauss
/gps/ene/mono 250 MeV
/gps/ene/sigma 3 MeV

I then, using TestEm7 plotted the BP's for both (in water) using Matlab and the attached BP's resulted. There's a significant difference in the d'20 - 'd'80 distances. Does any know why?

Best regards and Merry Christmas/Happy holidays/whatever floats your boat.

Tim

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2017/12/13/09.27-3465-_From_Inbuilt_Gassian.jpg
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2017/12/13/09.27-63506-BP_from_my_Gaussian.jpg

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1 Idea: Re: Geant4 Gaussian Energy distribution vs hand coded Gaussian   (Vladimir Ivanchenko - 21 Jan, 2018)
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