English-Finnish translations for half-life

  • puoliintumisaikaUkrainan alueilla, jotka altistuivat cesium 137:lle - isotoopille, jonka puoliintumisaika on 30 vuotta - elintarvikkeissa on vielä tänäänkin havaittavissa saastumista. Even today, contamination is to be found in food produced in the regions of Ukraine which were exposed to radioactive caesium 137 - an isotope which has a half-life of 30 years. Voimaloiden räjähdykset ja sulamiset muodostavat uhan ympäröivälle elämälle laajalla alueella, ja lisäksi syntyy radioaktiivista jätettä, jonka puoliintumisaika on uskomattoman pitkä. Not only does the explosion or meltdown of installations threaten the life of a wide environment, there are also dangerous radio-active residual products with an incredibly long half-life.

Definition of half-life

  • The time required for half of the nuclei in a sample of a specific isotope to undergo radioactive decay
  • The time it takes for a substance to lose half of its pharmacological, physiologic, or radiological activity

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