Created attachment 754 [details] printout of /process/had/verbose The time threshold for isomers production is not the same if RadioactiveDecay process is registered or not. In Geant4 11.0 : 1 microsecond and 1 nanosecond respectively. In attachment, printout of /process/had/verbose with and without RadioactiveDecay registered.
Default threshold half-life now set to 1 ns in G4Radioactivation.cc This is now the same as that in G4DeexPrecoParameters.
HI Dennis, I reopen bugzilla, as the problem remains. Cheers, Michel