Chlorine 36 dating groundwater

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Chlorine has 9 isotopes with mass numbers ranging from 32 to Only three of these isotopes occur naturally: stable 35 Cl The ratio of 36 Cl to stable Cl in the environment is about x 10 : 1 Bentley et.

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Chlorine 36 Cl is an isotope of chlorine. Chlorine has two stable isotopes and one naturally occurring radioactive isotope, the cosmogenic isotope 36 Cl. In the top meter of the lithosphere, 36 Cl is generated primarily by thermal neutron activation of 35 Cl and spallation of 39 K and 40 Ca. The half-life of this isotope makes it suitable for geologic dating in the range of 60, to 1 million years.

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