The invention of radiocarbon dating

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Gove H. Certain chemical elements have more than one type of atom. Much of the initial interest in carbon came from archeology, for the isotope could assign dates to Egyptian mummies and the like. Refined chemical and physical analysis is used to determine the exact amount remaining, and from this the age of a specimen is deduced. From about untilwhen atmospheric nuclear testing was banned, it is estimated that several tonnes of 14 C were created. The accuracy and precision of the interlaboratory data for the control samples were outstanding, leaving no doubt as to the quality of the AMS measurement technique Fig.

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When a date is quoted, the reader should be aware that if it is an uncalibrated date a term used for dates given in radiocarbon years it may differ substantially from the best estimate of the actual calendar date, both because it uses the wrong value for the half-life of 14 Cand because no correction calibration has been applied for the historical variation of 14 C in the atmosphere over time.

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The Story of Carbon Dating

For example, Hans Suess relied on a variety of helpers to collect fragments of century-old trees from various corners of North America. Tricks also spread through visits between laboratories and at meetings, and sometimes even through publications. Stafford, T. Introduction This article is about metrology, the science of measurement. This implies a dating capability of submilligram amounts of modern carbon. This version was presented by Libby during his Nobel Lecture in ; an earlier version appeared in

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