| Summary: | Evaporation of a "double neutron" Z0A2 particle from Bertini/INUCL | ||
|---|---|---|---|
| Product: | Geant4 | Reporter: | John Apostolakis <John.Apostolakis> |
| Component: | processes/hadronic/models/cascade | Assignee: | Michael Kelsey <kelsey> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | dennis.herbert.wright, zmarshal |
| Priority: | P3 | ||
| Version: | 9.4 | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| URL: | https://savannah.cern.ch/bugs/?81126 | ||
I should mention that these warning shows up in many test jobs. These comments appear once per job for residual nucleus fragments which consist solely of neutrons (and which are then passed off for immediate evaporation). They appear now because Bertini was migrated to make use of G4ParticleDefinition. We have modified G4ParticleDefinition so that it can be set to suppress the warning; the Bertini message anticipating that warning will also be turned off. These changes are in SVN, and should be included in the next patch of 9.4. |
When simulating an interaction of a Pi Minus, the Bertini module appears to create two problematic fragments in its evaporation phase: it creates a neutron it also creates a "double neutron" This occurs when a pi- of about 519 MeV (=520-1.41) interacts in a support element of ATLAS. The printout below was generated: * G4Track Information: Particle = pi-, Track ID = 8344339, Parent ID = 18 ********************************************************************************************************* Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName ... 10 -966 394 -2.23e+03 520 0.000209 1.03 156 TRT::OuterSupportB Transportation >>> G4InuclNuclei creating temporary fragment for evaporation with non-standard PDGencoding. G4PDGCodeChecker::CheckPDGCode : ??? Illegal PDG encoding for nucleus PDG code=1000000010 Particle Z0A1 has a strange PDGEncoding *** G4Exception : PART102 issued by : G4ParticleDefintion::G4ParticleDefintion Strange PDGEncoding *** This is just a warning message. >>> G4InuclNuclei creating temporary fragment for evaporation with non-standard PDGencoding. G4PDGCodeChecker::CheckPDGCode : ??? Illegal PDG encoding for nucleus PDG code=1000000020 Particle Z0A2 has a strange PDGEncoding *** G4Exception : PART102 issued by : G4ParticleDefintion::G4ParticleDefintion Strange PDGEncoding *** This is just a warning message. [[Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName ]] 11 -969 390 -2.25e+03 0 1.41 14 170 TRT::OuterSupportB PionMinusInelastic