Problem 912

Summary:	Neon Elastic Scattering
Product:	Geant4	Reporter:	walter.lippincott
Component:	processes/hadronic/processes	Assignee:	dennis.herbert.wright
Status:	RESOLVED WORKSFORME
Severity:	normal
Priority:	P2
Version:	7.1
Hardware:	Other
OS:	Linux

Description walter.lippincott 2006-11-27 16:32:38 CET

I'm trying to simulate scattering of neutrons off liquid neon using
G4ELASTIC1.1. This has worked well with liquid argon. When I do liquid neon,
however, a LElastic scattering event turns the recoil nucleus into a Na22
nucleus, instead of a Ne20. One example of the result is that the deposited
energy shifts from that expected from a mass number of 20 to that expected for
a mass number of 22.

Comment 1 dennis.herbert.wright 2007-01-05 18:11:59 CET

Hi Walter,
   I tested the G4LElastic model and the G4HadronElasticProcess in isolation
for neutrons on liquid neon.   I tried incident neutron energies of 1, 10, 100
and 1000 MeV and looked for the recoils.   I did not observe any Na22.  I did
these tests in Geant4 V 8.2, so perhaps you could repeat your simulation using
this release.
  Is it possible that you had radioactive decay assigned to the recoil?  That
would explain the Na22.   If, after trying your simulation with V8.2 and you
still see Na22 showing up, please send me detailed information about your
setup and I will try to isolate the problem.