Hi. I have an assignment where a muon gets caught in a zinc atom (Z=30) at n=2. I'm supposed to calculate the energy of the photon that is emitted in the transition to n=1. I have managed to calculate the energy of this photon, but I'm having a little trouble determining the validity of my result: The result I got was that the emitted photon had an energy of approximately 380 MeV. Even though I expected a high energy/frequency since the mass of the muon is larger than that of an electron, I still think that this is an extremely high energy. I don't have extremely much experience of this type of calculations, and maybe the result _is_ within reasonable limits, but I actually don't know. Thanks in advance.