Radiocarbon dating by willard libby
A famous American colleague, Professor Brew, briefly summarized a common attitude among archaeologists toward it, as follows: ‘If a C-14 date supports our theories, we put it in the main text.If it does not entirely contradict them, we put it in a footnote. A side from the few that can be checked by historical records, there is no way to verify the accuracy of C-14 dates.At death, the carbon 14 continues on with its radioactive decay.Theoretically, analysis of this carbon 14 can tell the date when the object once lived, by the percent of carbon-14 atoms still remaining in it.1- Libby’s method involves counting the Geiger counter clicks per minute per gram of a dead material in order to figure out when that plant or animal died.
Two researchers from the University of Uppsala, Sweden, in their report to the Twelfth Nobel Symposium, said this: “C-14 dating was being discussed at a symposium on the prehistory of the Nile Valley.
It is the special method used, by scientists, to date organic materials from earlier times in history.
Cosmic rays that enter our atmosphere from outer space strike the earth and transform regular nitrogen (nitrogen 14) to radioactive carbon (carbon 14).
(10) Atmospheric nitrogen: Nitrogen is the precursor to Carbon 14, so the amount of nitrogen in the atmosphere must have always been constant.(11) Instrumentation and analysis: The instrumentation is precise, working properly, and analytic methods are always carefully done.(12) Uniform results: The technique always yields the same results on the same sample or related samples that are obviously part of the same larger sample.(13) Earth’s magnetic field: Earth’s magnetic field was the same in the past as it is today. Part of the sample tests one way, and part tests another way.
We have some big “ifs” in the above 13 assumptions! Thus, the meaning of dates by Carbon 14 prior to 1600 B. So many factors affect this that the experts are finding it seemingly impossible to arrive at accurate dates.