Year libby discovered radiocarbon dating

Fortunately, it is so simple - which is probably not always the case with chemical research distinguished with the Nobel Prize - that everyone should be able to understand the conditions and principles for its execution.

Carbon-14 is a kind of carbon, an isotope of carbon with an atomic weight of 14, which is found in the carbon dioxide of the air.

year libby discovered radiocarbon dating-55year libby discovered radiocarbon dating-7

Important results were obtained in rapid succession.

Egyptologists received important support in their efforts to create a chronology dating back to about two thousand years earlier than the first royal dynasty, which started around 3,400 B. It was proved that the last great glacial period in the northern parts of Europe and North America was simultaneous, and still had a considerable extension about 11,000 years ago.

In about one million million of these carbon atoms, there is only one which has an atomic weight of 14.

But nevertheless, this ratio can be determined, for carbon-14 is a radioactive isotope and manifests itself by its radiation.

This refined method was then tested by Libby and co-workers on, among other things, charcoal and wood found in Egyptian graves.

The oldest, about 5,000 years old, were from the time of Vizier Hemaka; the youngest, about 2,000 years old, were from the Ptolemaic period, and others were from the time between these two periods.

If it is assumed that the intensity of the cosmic radiation has been constant during the last few tens of thousands of years, then the average lifetime of carbon-14 - which is approximately 8,000 years - should be sufficiently long to allow for the formation of a stationary state in the concentration of this isotope not only with reference to the atmosphere, but also to the hydrosphere and biosphere as well.

Active and non-active carbon dioxide are dissolved in a contant ratio in the water of the seas and lakes where they are converted into carbonate and bicarbonate, and they are assimilated by trees and plants, and finally also by the animals, which ultimately live on plants.

Similar findings were made in Iraq, showing that people lived there 25,000 years ago.

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