Nuclear Science Week 2021 (ANS GT Chapter)

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Across
  1. 4. Nuclear reaction joining two smaller nuclei to make one bigger nucleus
  2. 6. When radiation ionizes molecules in living cells, it can cause damage like _____, which occurs when there is damage to DNA
  3. 9. The time taken for half of the atoms in a sample of radioactive material to decay/ disintegrate
  4. 10. _____ particle is a helium nucleus (two protons and two neutrons; 2+ charge) and is emitted as radiation from a decaying heavy nucleus
  5. 12. CT, which is widely used in medicine as diagnostic imaging, stands for Computed _____.
  6. 13. Most alpha particles can be stopped by a thin piece of _____ or the dead cells in the outer layer of human skin.
Down
  1. 1. Region in Japan where the most severe nuclear accident took place since the Chernobyl disaster in 1986.
  2. 2. The three key factors to reduce radiation exposure are time, _____, and shielding.
  3. 3. Marie and Pierre _____ discovered the existence of the elements radium and polonium
  4. 5. _____ particle is a high kinetic energy electron produced in the nucleus (1- charge), and is emitted as ionizing radiation from a decaying nucleus
  5. 7. Nuclear _____ are used at nuclear power plants for electricity generation and in nuclear marine propulsion
  6. 8. _____ ray is a very high frequency electromagnetic radiation from the nucleus (no charge).
  7. 11. Gamma radiation is very penetrating and must be shielded by very dense materials, such as a large amount of concrete or _____.