Hello.
With the geant4 version 9.5(including patch02). By using G4RadioactiveDecay, I test the isotopes decay. The following isotopes will cause segment fatal at line G4RadioactiveDecay.cc:1627

1624             } else {
1625               // A decay channel has been identified, so execute the DecayIt.
1626               G4double tempmass = parentNucleus->GetPDGMass();      
1627               tempprods = theDecayChannel->DecayIt(tempmass);
1628               weight *= (theDecayChannel->GetBR())*(theDecayTable->entries());
1629             }
1630           } else {

These isotopes are:
#F24
/gps/ion 9 24 0 0
#Ne24
/gps/ion 10 24 0 0
#Po201
/gps/ion 84 201 0 0
#Cs137
/gps/ion 55 137 0 0

At the same time the following command was applied: /grdm/analogueMC false 

Turn analogueMC to true or set a very large hlTreshold can avoid this problem.


I think the problem comes from line G4RadioactiveDecay.cc:1074
1072             if (level->HalfLife()*ns >= halflifethreshold ){
1073               // save the metastable nucleus 
1074               theDecayTable->Insert(theChannel);
1075             }
1076             else{
1077               brs[theDecayMode] += theChannel->GetBR();
1078             }

The "theChannel" is from line G4RadioactiveDecay.cc:1057
1054       // Go through the decay table and to combine the same decay channels
1055       //
1056       for (i=0; i<aTempDecayTable->entries(); i++) {
1057         theChannel             = aTempDecayTable->GetDecayChannel(i);
1058         theNuclearDecayChannel = static_cast<G4NuclearDecayChannel *>(theChannel);
1059         theDecayMode           = theNuclearDecayChannel->GetDecayMode();

When call "theDecayTable->Insert(theChannel)", then "theDecayTable" and "theChannel" will be deleted at line G4RadioactiveDecay.cc:1212
1209           }
1210         } // end of testing daughter nucleus
1211       } // end of i loop( the branches) 
1212       delete theDecayTable;
1213 
1214     } //end of for j loop
1215     nS = nT;

Go back to line G4RadioactiveDecay.cc:1627. The particle's decay channel are to be invalid. An segment fatal will occur.

I don't know the purpose of line 1074 and the variable "theDecayChannel". Does the "theDecayChannel" effect the particle's original decay table? Because it not assigned to a particle and it will be delete finally. 

Thanks.

Best regards.

Chenghai