Half-life of a radioisotope refers to the amount of time it takes for half the mass of the substance to decay. This process typically involves the release of ionizing radiation, which is why this type of decay is commonly associated with nuclear physics and radiation treatment.

Which procedure is based on the half-life of a radioisotope?

Half-life is used as a measure of how quickly a radioactive material decays in various procedures, including:

  • Radiotherapy: Radiation therapy, or radiotherapy, is the one of the main treatments for cancer. The half-life of the radioisotopes used for this procedure is used to determine the dosage amount and time between treatments.
  • Carbon dating: Carbon dating is used to determine the age of archaeological remains. Radioisotopes with a long half-life are used to measure the age of samples.
  • Radioactive waste disposal: Radioactive waste must be safely and securely stored to avoid any harm to the environment. When disposing of radioactive waste, the half-life of the radioisotope must be taken into account to ensure that the waste does not pose a health risk.


Half-life of a radioisotope can be used to measure the time it takes for the material to decay, which is a key factor in procedures such as radiotherapy, carbon dating, and radioactive waste disposal. By understanding the half-life of a radioisotope, we are able to ensure that these procedures are carried out safely and efficiently.

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