After testifying against his criminal conspirators, Tekashi69, real name Daniel Hernandez, has just entered the FBI witness protection program. While working at his new day job in construction, Tekashi69 "falls" from a two story window, leaving him unable to walk and in incredible pain. His handler, Jack Webb, takes Tekashi69 to his local area hospital hoping that his prominent facial tattoos will not blow his cover. Physician's diagnose Tekashi69 with a shattered hip and say he is in need of an immediate hip joint replacement. Dr. Octagon, the consulting orthopedic surgeon, prepares for surgery but notices the packaging of the hip prosthetic he needs to use has been compromised and is no longer sterile. The prosthetic is composed of metal and plastic, stable at temperatures under 100oC, sensitive to ionizing radiation, and chemically non-reactive. Which sterilization technique would you recommend Dr. Octagon use to sterilize the hip prosthetic?