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Radiation

Radiation. Alpha, Beta, Gamma. Parts of a Nuclear Reactor. Nuclear Fission. Fission means “to split apart” just like the word fissure is a crack or split in a surface. Fission occurs when free neutrons are fired at a nucleus and it splits apart, giving off a tremendous amount of energy.

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Radiation

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  1. Radiation Alpha, Beta, Gamma

  2. Parts of a Nuclear Reactor

  3. Nuclear Fission Fission means “to split apart” just like the word fissure is a crack or split in a surface. Fission occurs when free neutrons are fired at a nucleus and it splits apart, giving off a tremendous amount of energy

  4. Nuclear Reactions When an atom’s nucleus is split apart a tremendous amount of energy is released. If this happens slowly in a controlled environment, we can harness this energy as heat energy. That heat is used to create steam which can power turbines for electrical generators. If an atom’s nucleus splits apart too quickly you have an uncontrolled chain reaction… the atomic bomb.

  5. Nuclear Fusion Fusion means “joining together” just like to fuse would mean to link or join Fusion occurs when smaller nuclei are joined together to form a bigger nucleus. The sun uses its tremendous heat and pressure to join hydrogen atoms to form helium, which gives off a large amount of energy.

  6. Nuclear Decay • Three particles play a part in Nuclear Decay: • Alpha Particle • Beta Particle • Gamma Particle (or Ray) • Nuclear decay takes a less stable nucleus to a more stable form. Materials that undergo nuclear decay are classified as radioactive.

  7. Alpha Decay An alpha particle (α) is the nucleus of a helium atom. The mass number is 4 and the number of protons is 2. The standard notation for an alpha particle is as follows: Ex. Uranium-238 undergoes alpha decay: An alpha particle can be stopped by a thick sheet of paper

  8. Write the alpha decay for the folling

  9. Gamma Rays A redistribution of the energy within the nucleus results in gamma decay. The gamma ray (γ) is a high-energy photon. Neither mass nor atomic number is changed in gamma decay. Several centimeters of lead are required to stop gamma rays.

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