What are the gamma energies in MeV usually attributed to the 60 Co source?

The gamma energies commonly associated with the cobalt-60 (60 Co) source are 1.17 and 1.33 MeV. These specific energy levels arise from the decay of cobalt-60, which is a widely used radionuclide in radiation therapy and clinical dosimetry.

The 1.17 MeV and 1.33 MeV gamma photons result from the interactions in the nucleus during the decay process, where cobalt-60 decays into nickel-60, emitting high-energy photons. These energies are particularly beneficial in medical applications due to their penetrative abilities, making them suitable for treating various cancers while enabling the characterization of radiation doses with precision.

In contrast, the other energy ranges provided in the choices do not correspond to the emissions from cobalt-60 and are not utilized in clinical settings with this source. Understanding these specific gamma energies is crucial for medical dosimetrists in planning and administering radiation therapy effectively.