Across
- 3. Beta radiation consists of this elementary particle.
- 6. Amount of nuclear decays per second. Measured in Becquerels (Bq)
- 8. Lots of this is released when nuclei undergo fission or fusion.
- 10. Common material, along with graphite, which can be used as a moderator.
- 12. Slows down neutrons to increase the chance of fission
- 13. Made of lead and concrete to block all types of radiation emitted from a Nuclear Reactor from getting to the outside.
- 15. The total mass of the products after fission or fusion _________. This difference is released as energy according to E = mc^2.
- 16. An atom where electrons have been removed, leaving them positively charged overall.
Down
- 1. Element from which control rods are made.
- 2. Radiation with a very short range, but high ionising strength. Consists of 2 protons + 2 neutrons.
- 4. A slow moving ______ needs to be absorbed by a uranium nucleus to start the fission process.
- 5. After 2 half-lives, the activity of a radioactive substance will be a _________ of what it started as.
- 7. These absorb neutrons to prevent an uncontrolled chain reaction and keep the rate of energy generation constant.
- 9. The process whereby two light nuclei join together to form a single heavy nucleus.
- 11. The process whereby a heavy nucleus splits into two lighter daughter nuclei.
- 14. Radiation which does not cause a nucleus to change into a different element when released. Not made of any particles.