What are the advantages and disadvantages of gamma rays when compared with X-rays for radiographic inspection?

TWI Frequently asked questions

by Ivan Pinson

Advantages of gamma rays compared with X-rays

• No electrical or water supplies needed
• Equipment smaller and lighter
• More portable
• Equipment simpler and more robust
• More easily accessed
• Less scatter
• Equipment initially less costly
• Greater penetrating power

Disadvantages of gamma rays compared with X-rays

• Poorer quality radiographs
• Exposure times can be longer
• Sources need replacing
• Radiation cannot be switched off
• Poorer geometric unsharpness
• Remote handling necessary