Nuclear Science Week Puzzle - Moderate

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Across
  1. 2. any event that changes genetic structure
  2. 5. type of reactor in Jamaica (easy freebie)
  3. 6. formed by the decay of another nuclide
  4. 9. disintegration per second
  5. 10. counter that measures gamma radiation via light flashes
  6. 12. electron formed when neutrons split in an atom
  7. 13. radiation produced in outer space
Down
  1. 1. slows neutrons
  2. 3. particle absorbed by paper
  3. 4. an isotope of hydrogen that contains 1 proton and 1 neutron per atom
  4. 7. used by doctors to "look" inside the body
  5. 8. decays to another nuclide
  6. 11. counter tube that detects ionizing radiation