The energy information of the primary particles output at the terminal is much smaller than what I set in the program

[Xuyang_Dong]

In my code ,I use fParticleGun-> SetParticleDefinition(“e-”);
fParticleGun-> SetParticleEnergy(300.*MeV); to define the energy of primary particle. but the information output from terminal is far less than my setting:

[bmorgan]

None of those tracks are the primary track - which would have Parent ID = 0 - but rather secondary tracks created by it (or secondaries of secondaries, etc).