Radioactive sources and X-ray fluorescence

Greetings everyone,
I’m currently trying to simulate a radioactive source of 60Co as impurities in a more voluminous target.
I want to observe the fluorescence X-ray induced by the emitted particles of the 60Co decay.
My first step is to simulate a simple 60Co radioactive source but even by looking at the rdecay01/02, I can’t make it works. Someone has an idea or an other examples I can look at ?

Best regards,