Can openmc do fixed source computing?

Can openmc do fixed source computing as described in the title? So I’m adding an external source to the whole model instead of the traditional fixed source, and if I can compute it, are there examples I can learn from? If not, why not? I hope someone can answer my questions. Thank you.

Hi lichw, welcome to the community.
I think you should check the examples from openmc documentation, there are various cases that could be tested and I hope some of them could be fitted to your case.
notebook entitled gamma detector (pulse height) could give you some glimpse of openmc pulse height feature for a fixed source calculation either by using a mono-energetic source or a photon source from Cs-137 decay.

If you have any specific cases, you might use them as keywords to search for another similar discussion in this forum. I hope some users have done it before so you can check it.

Thank you very much for your answer, which has benefited me a lot.