Nuclear Physics

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Across
  1. 8. A series of fission reactions triggered by released neutrons
  2. 9. Process of removing or adding electrons to an atom
  3. 12. Joining of two light nuclei to form a heavier nucleus
  4. 16. Negatively charged particle orbiting the nucleus
  5. 17. Material used to absorb radiation in reactors
  6. 19. Natural radiation present in the environment
  7. 20. Instrument used to detect radiation
  8. 22. A type of radiation consisting of 2 protons and 2 neutrons
Down
  1. 1. Splitting of a heavy nucleus into lighter nuclei
  2. 2. Spontaneous emission of radiation from unstable nuclei
  3. 3. Emission of energy as particles or waves
  4. 4. Exposure to radiation without physical contact
  5. 5. A high-speed electron emitted during radioactive decay
  6. 6. Change of an unstable nucleus into a more stable one
  7. 7. Unwanted presence of radioactive material
  8. 10. The dense central part of an atom
  9. 11. A device used to control nuclear fission
  10. 13. Neutral particle found in the nucleus
  11. 14. Atoms of the same element with different numbers of neutrons
  12. 15. Positively charged particle in the nucleus
  13. 18. life Time taken for half the radioactive nuclei to decay
  14. 21. High-energy electromagnetic wave emitted from a nucleus