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Keywords: nan momentum direction
Forum: Processes Involving Optical Photons
Date: 07 Dec, 2005
From: Ben Loer <Ben Loer>

Here is the output it gives me with verbose level set to 2. I am using Geant4.7 patch1.

*********************************************************************************************************
* G4Track Information:   Particle = gamma,   Track ID = 6252,   Parent ID = 1
*********************************************************************************************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0    -18.1   -0.697    0.411    0.0129        0        0         0     p_strip initStep
    1    -17.9    -0.75    0.875    0.0127        0    0.523     0.523     p_strip compt
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  1 ---------------
    :     -17.9     -0.75     0.875  0.000286                 e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------
    2     11.9     4.17    -9.78    0.0126        0     32.1      32.6     p_strip polarCompt
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  2 ---------------
    :      11.9      4.17     -9.78  4.57e-05                 e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------
-----------------------------------------------------------
    *** Dump for solid - startstrip ***
    ===================================================
 Solid type: G4Box
 Parameters:
    half length X: 20.5 mm
    half length Y: 5 mm
    half length Z: 125 mm
-----------------------------------------------------------
Position:

p.x() = 11.93047830246582 mm
p.y() = 4.169383963993893 mm
p.z() = -9.780518325305247 mm

Direction:

v.x() = nan
v.y() = nan
v.z() = nan

Proposed distance :

snxt = 9e+99 mm

G4VParticleChange::SetNumberOfSecondaries() Warning  theListOfSecondaries is not empty
*** G4Exception : Notification
      issued by : G4Box::DistanceToOut(p,v,..)
Undefined side for valid surface normal to solid.
*** This is just a warning message.
    3      nan      nan      nan    0.0121        0     3.61      36.2     p_strip polarCompt
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  3 ---------------
    :       nan       nan       nan  0.000481                 e-
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------
    4      nan      nan      nan    0.0121        0        0      36.2  OutOfWorld Transportation

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