Problem 516

Summary:	The problem concerns the sampling of Rayleigh scattering at small angles
Product:	Geant4	Reporter:	Nicolas.Freud
Component:	processes/electromagnetic/lowenergy	Assignee:	longof
Status:	RESOLVED LATER
Severity:	normal
Priority:	P2
Version:	4.0
Hardware:	PC
OS:	Linux

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.