Home > Science > Additional OCR Gateway Science Topics > Radiation for life > Radiation treatment
Radiation for life
A radioactive tracer must emit either:
X-rays or gamma rays
X-rays or beta particles
Gamma rays or beta particles
What stops gamma rays?
Very thick lead
X-rays are similar to gamma rays in that they're both:
Given off by radioactive nuclei
Stopped by bone
Which type of nuclear radiation is used to treat cancer deep inside the body?
Why is more than one beam of gamma rays used to treat tumours?
All the cancerous cells are killed
Very few non-cancerous cells are killed
Lots of non-cancerous cells are killed