Problem 904

Summary: IonInelastic (BinaryLightIonReaction) can not be activated for He3
Product: Geant4 Reporter: pshenich
Component: processes/hadronic/modelsAssignee: dennis.herbert.wright
Status: RESOLVED WORKSFORME    
Severity: major    
Priority: P2    
Version: 8.1   
Hardware: PC   
OS: Linux   

Description pshenich 2006-11-06 04:07:07 CET 
Dear All,
As far as I understood, since the version 7.0  He3 is considered as a generic ion.
Therefore one can expect that hadronic models for He3 beams (e.g.
G4BinaryLightIonReaction) are active as soon as they are active for GenericIon.
However, I have no hadronic interactions of He3 in my G4 application, only EM ones.

For the sake of simplicity one can also use TestEm7 with a little "hacking" to
reproduce the problem:

In ionC12.mac one can replace

/gun/ion 6 12 6
/gun/energy 3.5 GeV

by

/gun/ion 2 3 2
/gun/energy 1.0 GeV

then with
/process/verbose 5
/process/list Hadronic
/process/setVerbose 5 IonInelastic
/process/dump IonInelastic
/process/dump Hadronic

or by setting the following environment variables:
export BCDEBUG=1
export BLICDEBUG=1

one can find out that no hadronic interactions produced with He3. This is
aparently the only exception, as hadronics works with deutron, alpha and Li-7,
for example.
Comment 1 dennis.herbert.wright 2007-02-26 16:58:59 CET 
I checked out and built TestEm7 and made the changes you suggested to ionC12.mac.
When I ran it the Binary Light Ion Cascade was called (many times) for 3He.
So it appears that 3He does undergo hadronic interactions, at least in Geant4
8.2, which is the version I used.
Comment 2 pshenich 2007-03-02 07:51:59 CET 
Yes, it does work now with the version 8.2, it did not work with 8.1. The
problem is  fixed now.
Thanks a lot!
Regards,
Igor