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Radiocarbondating

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In Accelerator Mass Spectrometry (AMS), for example, the number of radiocarbon atoms in a stream of atoms coming from the sample is counted.

Thus there are statistical counting uncertainties proportional to the square root of the number of atoms counted.

At an ar­chaeological dig, a piece of wooden tool is unearthed and the archaeologist finds it to be 5,000 years old.

The measurement, before calibration, came back with an error bar of /- about 60 radiocarbon years. It should be noted that these measurement uncertainties do not increase linearly as one goes back in time.For example, modern biblical chronology dates Noah's Flood to 3520 /- 21 B. Since its first use in the 1940s radiocarbon dating has been the most accurate method of dating ancient objects and artifacts.In this article, we will examine the methods by which scientists use radioactivity to determine the age of objects, most notably carbon-14 dating.Carbon-14 dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old.Modern radiocarbon dating uses tree-ring chronologies to produce the calibration curve.