Kill particles born in the wrong volume

Particles, Track, Event, Run and Biasing
1

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Geant4 Version: 11.1.1.
_Operating System:_Windows
_Compiler/Version:_Visual Studio 2022
_CMake Version:_3.23

Hello everyone,

is there a way to kill particle if they are launched (i.e. primary particles) inside a volume with a given copy number?

I tried with the function:

GetOriginTouchable() to obtain the G4Vtouchable of the volume where the particle is originated, and then kill the particle track inside the stepping class, as shown in the following lines:

const G4VTouchable *touchable_origin = aStep->GetTrack()->GetOriginTouchable();
G4int copyNo_origin = touchable_origin → GetCopyNumber();
if( particle_name == “e-” && particle_ID ==1 && copyNo_origin == 1 )
{
track->SetTrackStatus(fStopAndKill);
}

However, in such way I get that the particle is killed AFTER the first step it does.
Is it possible to kill it before the particle does the first step?

Thanks for the help,

Tommaso.

2

It must be done in TrackingAction::PreUserTrackingAction()

4

Thank you for the help!