TNPSC Thervupettagam

Calcium-41 radiometric dating

May 26 , 2023 386 days 365 0
  • Since its invention in 1947, carbon dating allowing scientists to estimate the age of an organic material based on how much carbon-14 it contains.
  • Carbon-14 has a half-life of 5,700 years.
  • So, the technique can’t determine the age of objects older than around 50,000 years.
  • In 1979, scientists suggested using calcium-41, with a half-life of 99,400 years, instead.
  • Calcium-41 is rarer, occurring once in around 1015 calcium atoms.
  • The researchers able to spot one calcium-41 atom in every 1016 calcium atoms with 12% precision in seawater.

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