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Forum: Physics List
Re: Question "bad" energy losses of pions
Date: 09 Nov, 2004
From: michel maire <michel maire>

 After adding the Plastic in DetectorConstruction, I ran extended/electromagnetic/TestEm5 with the following macro :

 # $Id: dedx2.mac,v 1.2 2004/08/02 11:30:05 maire Exp $
 #
 # macro file for TestEm5.cc
 #
 # to control dE/dx calculation
 #
 /control/verbose 2
 /run/verbose 2
 #
 /testem/det/setAbsMat Plastic   
 /testem/det/setAbsThick 11 cm  
 /testem/det/setAbsYZ    11 cm
 #
 /testem/phys/addPhysics standard
 /testem/phys/setCuts 1 km
 #    
 /run/initialize
 #
 /testem/gun/setDefault
 /gun/particle pi+ 
 /gun/energy 300 MeV
 #
 /testem/histo/setFileName msu2.paw
 /testem/histo/setHisto 1 100 0. 100. MeV	#energy in absorber
 #
 /run/beamOn 10000

 I attach the output :

 Run Summary
  Number of events processed : 10000
  User=0.07s Real=3.03s Sys=2.94s

 ======================== run summary ======================

 The run was 10000 pi+ of 3e+02 MeV through 11 cm of Plastic (density: 1 g/cm3     )

 Total energy deposit in absorber per event = 22.59 MeV +- 25.69 keV

 Mean dE/dx  = 2.053 MeV/cm      stopping Power = 1.974 MeV*cm2/g
 (from Table = 2.062 MeV/cm)     (from Table    = 1.983 MeV*cm2/g)

 Total track length (charged) in absorber per event = 11 cm +- 181.1 nm
 Total track length (neutral) in absorber per event = 418.6 mum +- 59.59 mum

 Number of steps (charged) in absorber per event = 1.005 +- 0.0001346
 Number of steps (neutral) in absorber per event = 0.0063 +- 0.0001346

 Number of secondaries per event : Gammas = 0;   electrons = 0;   positrons = 0

 Number of events with the primary particle transmitted = 99.29 %
 Number of events with at least  1 particle transmitted (same charge as primary) = 100 %

 Number of events with the primary particle reflected = 0 %
 Number of events with at least  1 particle reflected (same charge as primary) = 0 %

 ----> Histogram Tree is saved in msu2.paw

 I will send you dirctly the histogram.

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1 None: Re: "bad" energy losses of pions   (Peter - 10 Nov, 2004)
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