irradiation and contamination

• What should you be able to describe by the end of the video?

  Meaning of irradiation and radioactive contamination
• What is irradiation?

  Exposing an object to nuclear radiation
• What types of radiation can cause irradiation?

  Alpha, beta, gamma radiation, or neutrons
• How is gamma radiation used in sterilization?

  It kills bacteria on medical equipment
• What is the process of sterilizing an object using gamma radiation?

  • Place object in sealed wrapper
  • Use a radioactive isotope emitting gamma radiation
  • Shield the isotope with lead
  • Allow gamma radiation to irradiate the object
  • Gamma radiation kills bacteria
• Does an object become radioactive after being irradiated?

  No, it does not become radioactive
• What is a major risk associated with ionizing radiation?

  Increased risk of cancer in humans
• What is the first precaution for workers handling radioactive isotopes?

  Shielding to stop the radiation
• How do different types of radiation vary in penetrating power?

  Alpha has low, beta and gamma have higher
• What material is used to stop alpha radiation?

  Gloves
• What is used to protect against beta and gamma radiation?

  Lead
• What is the purpose of a radiation writer?

  To measure radiation exposure levels
• What happens to a person who is exposed to too much radiation?

  They may stop working with isotopes
• What is radioactive contamination?

  Unwanted radioactive isotopes on materials
• Why is radioactive contamination more hazardous than irradiation?

  It involves radioactive sources on or in you
• How can alpha emitters be dangerous?

  If inhaled or swallowed, they damage DNA
• How do beta particles compare to alpha particles in terms of ionization?

  Beta particles are less ionizing than alpha
• What is the ionizing effect of gamma rays?

  Weakly ionizing and can pass through the body
• Why is peer review important in scientific studies on radiation?

  It allows findings to be checked by others
• What are the key concepts related to radiation discussed in the video?

  • Irradiation
  • Radioactive contamination
  • Hazards of radiation
  • Precautions against radiation