Radiocarbon dating
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Radiocarbon dating (usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 () to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years. Raw, i.e., uncalibrated, radiocarbon ages are usually reported in radiocarbon years "Before Present" (BP), with "present" defined as CE 1950. Such raw ages can be calibrated to give calendar dates. One of the most frequent uses of radiocarbon dating is to estimate the age of organic remains from archaeological sites. When plants fix atmospheric carbon dioxide () into organic matter during photosynthesis they incorporate a quantity of that approximately matches the level of this isotope in the atmosphere. After plants die or they are consumed by other organisms (for example, by humans or other animals), the accumulation of fraction stops and the material declines at a fixed exponential rate due to the radioactive decay of . Comparing the remaining fraction of a sample to that expected from atmospheric allows the age of the sample to be estimated.
- See also: Wikipedia
| Radiocarbon - The main international journal of re... Radiocarbon - The main international journal of record for research articles and date lists relevant to 14C www.radiocarbon.org - Web |
| C14dating.com - General information on Radiocarbon... C14dating.com - General information on Radiocarbon dating www.c14dating.com - Web |
| calib.org - Calibration program, Marine Reservoir ... calib.org - Calibration program, Marine Reservoir database, and bomb calibration calib.org - Web |
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| NOSAMS: National Ocean Sciences Accelerator Mass S... NOSAMS: National Ocean Sciences Accelerator Mass Spectrometry Facility at the Woods Hole Oceanographic Institution www.whoi.edu/nosams/page.do?pid=40138.html - Web |
| Discussion of calibration Discussion of calibration c14.arch.ox.ac.uk/calibration.html - Web |
| Several calibration programs can be found at www.r... Several calibration programs can be found at www.radiocarbon.org www.radiocarbon.org/Info/index.html - Web |
| CalPal Online (Cologne Radiocarbon Calibration & P... CalPal Online (Cologne Radiocarbon Calibration & Paleoclimate Research Package) www.calpal-online.de - Web |
| OxCal program (Oxford Calibration) OxCal program (Oxford Calibration) c14.arch.ox.ac.uk/oxcal.html - Web |
| Fairbanks' Radiocarbon Calibration program (for pr... Fairbanks' Radiocarbon Calibration program (for prior to 12400 BP) radiocarbon.ldeo.columbia.edu/research/radiocarbon.htm - Web |
| Notes on radiocarbon dating, including movies illu... Notes on radiocarbon dating, including movies illustrating the atomic physics id-archserve.ucsb.edu/.../08_Radiocarbon_Dating.html - Web |
| Carbon Dating-How it works? Carbon Dating-How it works? science.howstuffworks.com/.../carbon-14.htm, - Web |
