Problem 358 - spike in Azimuthal distributions in Gheisha
Summary: spike in Azimuthal distributions in Gheisha
Status: CLOSED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: processes/hadronic (show other problems)
Version: 4.0
Hardware: PC Linux
: P5 normal
Assignee: Hans-Peter.Wellisch
URL: http://i.home.cern.ch/i/iglez/www/ali...
Depends on:
Blocks:
 
Reported: 2002-02-15 02:57 CET by Isidro.Gonzalez
Modified: 2003-03-13 02:07 CET (History)
1 user (show)

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this problem.
Description Isidro.Gonzalez 2002-02-15 02:57:32 CET 
The azimuthal distribution of nucleons emited in p+X interactions produces a
spike at phi=0 (pz=0 when shutting in the x direction) for proton energies of
597 MeV and 800 MeV. Between 12% and 18% of the events had at least one such
nucleon.  The fractions of nucleons with pz=0 (exactly) is between 1.1% adn
2.9%.
Comment 1 Hans-Peter.Wellisch 2002-02-25 02:37:59 CET 
I saw the plots, concerning the LEP (low energy parametrized) models.
I trust the 2% spike is there. Since it is a small effect, and happens only at
energies far above the spallation energy range it made this low priority,
though.
Comment 2 Hans-Peter.Wellisch 2002-09-06 02:22:59 CEST 
Hi Isidro,

  this one is fixed in geant4 4.1.

Many greetings,

Hans-Peter.
Comment 3 Hans-Peter.Wellisch 2002-09-06 02:27:59 CEST 
working around a shortcoming of bugzilla. Please ignore....