Which fundamental force explains the decay of carbon-14 used in radiocarbon dating?
Quick Answer
The weak nuclear force causes carbon-14 to decay into nitrogen-14. Its relatively slow action makes radiocarbon dating possible.
The Full Story
Carbon-14 is unstable because one of its neutrons can transform into a proton through beta decay. That transformation is governed by the weak nuclear force. Carbon-14 has a half-life of about 5,730 years, which is long enough to be useful for dating once-living material but short enough to measure over human timescales. This method, developed in the late 1940s by Willard Libby, revolutionized archaeology and geology. The weak force is therefore not just a particle-physics concept; it also underpins a major scientific dating technique.
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