Why is gamma rays used for sterilizing medical equipment?

Gamma rays are used for sterilizing medical equipment because they have high energy that can penetrate materials to kill microorganisms like bacteria, viruses, and fungi. This method is effective in achieving sterility without leaving any residue or causing damage to the equipment. Gamma ray sterilization is also able to reach hidden and hard-to-reach areas that other sterilization methods may not be able to.