Nuclear Physics -PSJ

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Across
  1. 5. -------balance is required for the purpose of the producing controlled energy.
  2. 7. suitable for fusion process.
  3. 8. when k=1, the chain reaction will be---.
  4. 9. number of neutrons goes on multiplying in geometrical progression.
  5. 10. discovered that when uranium was bombarded with thermal neutrons, brake up into barium and krypton nuclei.
  6. 11. nuclear chain reaction is------reaction.
  7. 12. an uncontrolled nuclear chain reaction results in--.
  8. 15. the production of energy in Sun is mainly due to ---cycle.
  9. 18. based on fusion principle.
  10. 19. received Nobel prize in physics for his discovery of neutron
  11. 21. fission is-------nuclear reaction.
  12. 22. for k>1, the chain reaction will be----.
  13. 23. in this process carbon acts as catalyst and 4 hydrogen nuclei fuse to give helium nucleaus.
  14. 26. thick wall of concrete surrounding the reactor.
  15. 27. wall of steel to protect from excessive heating and damage of nuclear reactor.
  16. 29. rate of the reactions in a nuclear reactor is controlled by---.
  17. 30. used for slowing down fast neutrons.
  18. 33. reactions which are highly dependent on temperature.
  19. 34. keeps the fuel assembly at a safe temperature.
  20. 36. Boron rods in a nuclear reactor are used to ----excess neutrons.
  21. 37. is used as control rods.
  22. 38. for k<1, the size of the body is-----.
Down
  1. 1. reflects the neutrons back into the core.
  2. 2. nuclear chain reaction can be controlled by
  3. 3. breaking up the nucleus of a heavy atom into two/more segments.
  4. 4. nuclei with ---- number of neutrons, undergo fission with fast neutrons
  5. 6. fusion reaction is initiated with the help of----.
  6. 13. If the multiplication factor is less than unity then the process will ---after sometime.
  7. 14. Fusion is -----induced nuclear reaction.
  8. 16. system in which nuclear fission is produced in a controlled, self-sustaining chain reaction.
  9. 17. process of combining two lighter nuclei into a heavier nucleaus.
  10. 20. nuclei with odd number of neutrons, undergo fission with ----neutrons
  11. 24. consists of nuclear reactor,heat exchanger,turbine,electric generator and condenser.
  12. 25. the energy released during fission process is known as---.
  13. 28. honored with Noble prize in physics for his discovery of nuclear reactions brought about by slow neutrons.
  14. 31. source of energy for the Sun and the stars.
  15. 32. is the best moderator.
  16. 35. example of uncontrolled chain reaction.