Set spectrum as a particle source

Particles, Track, Event, Run and Biasing
1

hello,
I have the following energy spectrum, my question is how can I use this spectrum as a source

Capture du 2020-06-03 19-59-22
Capture du 2020-06-03 19-59-22974×623 26.3 KB

1 Like
2

http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/ForApplicationDeveloper/html/GettingStarted/generalParticleSource.html

3

see also examples/extended/eventgenerator/particleGun : run2
and exgps/macros/README

4

Thank you all.
It’s helpful

5

Is it also possible to do this with a particle gun?

6

Not using G4ParticleGun directly. You can write your own PrimaryGeneratorAction with G4ParticleGun as a data member. Write your own code to throw the energy randomly from the spectrum, and then pass that energy, a random direction, and a particle type into your G4ParticleGun data member.

Of course, GPS has that functionality, and you can configure it with any spectrum you like via macro commands, so it’s more flexible.

7

Hi,dear!
Recently I am learning about how to set the particle source. How do you get such a energy spectrum?