How is carbon 14 dating used


25-Aug-2017 02:53

Energy absorbed from ionizing radiation frees electrons to move through the crystal lattice, some of which are trapped at imperfections in the crystal lattice.Later, heating releases the trapped electrons, producing light.Natural radioactivity causes latent thermoluminescence to build up so the older an object is, the more light is produced.Therefore, thermoluminescence dating is actually determining the last time a crystal was heated and electrons were released. Unfortunately there are no affordable direct methods for dating pigments, except in some cases as we will see later.

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The last time a crystal was reheated and its electrons were released is known as a "clock resetting event".Measuring the intensity of the luminescence can determine how much time has passed since the last time the object was heated.The light is proportional to the amount of radiation absorbed since the material was last heated.When the sample is heated in the lab, it releases thermoluminescence light.



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