Which statement describes the characteristics of neutron radiation?

• A. It cannot penetrate the skin.
• B. It can penetrate all parts of the body and affects the whole body.
• C. It only affects the liver.
• D. It is easily blocked by clothing.

Answer: (B)

Neutron radiation consists of neutral particles that travel through matter with relatively little immediate interaction, so they can cross the skin and reach deeper tissues. Because they’re not blocked by clothing and can interact with many nuclei inside the body, neutrons can deliver energy throughout multiple organs, leading to whole-body exposure rather than just a surface or localized effect. Shielding neutrons isn’t as simple as using everyday clothing; effective protection relies on materials rich in light nuclei (like hydrogen) to slow them down and capture them. This combination of deep penetration and potential for distributed dose is why the statement describing the capability to affect the whole body is the best description.