Carbon 14 dating equation
Carbon 14 dating equation - datingstile
The problem: If the material is too old, the small amount of C14 present may not decay in the measurement interval. Nearby radioactive material could trigger exactly the same C14 production process from nitrogen as occurs in the upper atmosphere, albeit at a much reduced rate.Newer, more accurate techniques use mass spectroscopy. It doesn't take much contamination to spoil a sample with near-zero quantity of C14. Another possible avenue is C13, which has a small but non-zero neutron absorption cross section.
In particular, given a pure sample of C12, I suspect a mass spectrometer would indicate that a non-zero amount of C14 present. All this means is that measured dates older than some oldest reliable date are just that -- to old to date reliably.
I might be able to see if I can come up with some references.
I won't be able to do so in the near term -- my wife and kids want me to stop dorking with the internet and go out to eat.
The cracker managed to get the TOA de-indexed by Google, and when the TOA was re-indexed on 2006/12/05, the cracker stepped up his efforts to direct webspam to the Google-bot.
I've been poking about on the internet again (as you do) and found a whole load of stuff by creationists about the problems with carbon 14 radiometric dating.
Specifically they report (with some glee) that coal has been found to contain measurable amounts of carbon14 which it should not of course because it is about 300 million years old and dates from the carboniferous period.
C14 has a half life of 5730 years and is only good to date objects to 50,000 years or so.
Although I can find any number of references to this seemingly vital finding on the creationist sites, I can find almost no attempt to refute or explain this anomaly on serious science sites. There seem to be some unsubstantiated references to the possibility of neutrons generated by uranium decay resulting in an anomalously high presence of C14.
Anyone have any ideas about this apparent anomaly with C14 in coal? supposedly has an article on this very subject (per Google), but I haven't been able to get to talkorigins for some time. The small apparent non-zero values are less than measurement error.
In other words, the readings are consistent with zero C14 content.
In fact, the experiments cited by the creationists appear to be attempts to establish the measurement error of there equipment.
Older carbon dating techniques directly detected decays of C14 atoms. The most common contaminant is nitrogen, 0.1% in gem-quality diamonds.