radiation is an effective sterilization method, but it is limited to commercial use
only. The product to be sterilized is exposed to radiation for 10 to 20 hours,
depending on the strength of the source. The highest temperatures reached in
gamma sterilization are usually 30-40°C. Gamma radiation is popular for sterilizing
before shipment and it can be done through the packaging. A dose of 2.5
megarad is generally selected for many items.