Nuclear Radiation - Separate Award

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Across
  1. 3. Radiation that travels at the speed of light
  2. 4. When an object absorbs nuclear radiation
  3. 5. Where radiation is used to treat cancer
  4. 7. An atom that has lost or gained an electron
  5. 9. When a nucleus gives out radiation
  6. 11. Particles used in a PET scan
  7. 14. Particle that can split heavy nuclei
  8. 15. The unit for countrate
  9. 17. A gas that is a large part of the background radiation
  10. 18. Radiation stopped by paper
  11. 19. A beta+ and beta- particle do this when they meet
  12. 22. Joining light nuclei
  13. 23. Splitting heavy nuclei
  14. 24. When an object has radioactive material on or in it
  15. 25. The same as an alpha particle
Down
  1. 1. A nuclear reaction that causes more reactions
  2. 2. Radiation that is an electron
  3. 6. Absorbs neutrons in a reactor
  4. 8. Radiation around us all the time
  5. 10. Slows down neutrons
  6. 12. _____ counter - detects radiation
  7. 13. Where nuclear radiation comes from
  8. 16. How long it takes for half a sample to decay
  9. 20. Same number of protons, different number of neutrons
  10. 21. Radiation increases the risk of this disease