Problem 516 - The problem concerns the sampling of Rayleigh scattering at small angles
Summary: The problem concerns the sampling of Rayleigh scattering at small angles
Status: RESOLVED LATER
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/electromagnetic/lowenergy (show other problems)
Version: 4.0
Hardware: PC Linux
: P2 normal
Assignee: longof
URL:
Depends on:
Blocks:
 
Reported: 2003-07-24 05:48 CEST by Nicolas.Freud
Modified: 2004-05-17 02:00 CEST (History)
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Description Nicolas.Freud 2003-07-24 05:48:11 CEST 
Despite the improvement of the sampling of the Rayleigh scattering angle
(following bug report #406), we have found that there is still a sampling
problem which occurs at small scattering angles. The correction of bug #406 has
removed an abnormal excess of scattered photons at very small scattering angles.
Now, another problem appears (less severe): there is no more Rayleigh scattering
occurring with small scattering angles, whereas the probability of scattering is
theoretically maximal at small angles. I can provide a more detailed description
of the problem if need be.
Best regards,
N. Freud
Comment 1 pia 2004-01-13 04:55:59 CET 
The problem is reassigned to the developer who took care of the fix to problem
406.
Best wishes,
Maria Grazia Pia
Comment 2 longof 2004-05-17 02:00:59 CEST 
The problem will require a detailed study of the Cross section sampling at very
small angle. Tests are in progress.