Tree ring and carbon 14 dating
Libby later received the Nobel Prize in Chemistry in 1960: (From Taylor, 1987).
The rapidity of the dispersal of C14 into the atmosphere has been demonstrated by measurements of radioactive carbon produced from thermonuclear bomb testing.By measuring the C14 concentration or residual radioactivity of a sample whose age is not known, it is possible to obtain the countrate or number of decay events per gram of Carbon.
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