Effective range of radiocarbon dating
By measuring the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of the artifact.I use most of these quotes as handouts to provide documentation for my lecture series.In order to date the artifact, the amount of Carbon-14 is compared to the amount of Carbon-12 (the stable form of carbon) to determine how much radiocarbon has decayed.
Isotopic ages have been obtained for material from five landing sites on the moon--those of Apollos 11, 12, 14, 15 and Luna 16; each site has a different age. Ideally, any one basaltic rock from a given site should yield the same isotopic age, regardless of the method used." Science News, V.101, p.12 CONSTANT RATES? Jueneman, FAIC, "There has been in recent years the horrible realization that radiodecay rates are not as constant as previously thought, nor are they immune to environmental influences. Each assumption is a potential variable, the magnitude of which can seldom be ascertained.When the charges were investigated, it was discovered, sure enough, if they had heard them used in the context of the lecture, they would have seen that the use was appropriate. When such individuals acknowledge facts contrary to their own interest, the credibility of their testimony increases dramatically.It should be remembered that we are not quoting these individuals to imply that they are creationists. We want you to know that these individuals are devout evolutionists.However, at the moment of death, the amount of carbon-14 begins to decrease because it is unstable, while the amount of carbon-12 remains constant in the sample.Half of the carbon-14 degrades every 5,730 years as indicated by its half-life.