Line source on generator cc

I have a detector to get the gamma spectrum from a Cs-137 (662 KeV) point source. But, now I have to change my point source into a line source (at least 2 cm long line source)?

Here is my code:

Is this correct? will it simulate 20 Cs-137 ions with 2 mm separation or have I made any mistakes?

#include "generator.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"

    fParticleGun = new G4ParticleGun(1);


    delete fParticleGun;

void MyPrimaryGenerator::GeneratePrimaries(G4Event *anEvent)

    G4int Z = 55;
    G4int A = 137;    

        G4double charge   = 0.*eplus;
        G4double energy = 0.662*MeV;

    G4ParticleDefinition* particle;
    G4ParticleDefinition* ion = G4IonTable::GetIonTable()->GetIon(Z,A,energy);
    G4double x0 = 0.0*mm;
    G4double x1 = 2.0*mm;
    G4double x = x0 + (x1-x0)*G4UniformRand()*20;
        G4ThreeVector pos(0., 0., x);
        G4ThreeVector mom(0., 0., 1.);




This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.