These improved field methods were sometimes motivated by attempts to prove that a 14 C date was incorrect. The ions are accelerated and passed through a stripper, which removes several electrons so that the ions emerge with a positive charge. Measurement of radiocarbon was originally done by beta-counting devices, which counted the amount of beta radiation emitted by decaying 14 C atoms in a sample. This one is a book: Learn More in these related Britannica articles:
To produce a curve that can be used to relate calendar years to radiocarbon years, a sequence of securely dated samples is needed which can be tested to determine their radiocarbon age.
Absolute dating Amino acid racemisation Archaeomagnetic dating Dendrochronology Ice core Incremental dating Lichenometry Paleomagnetism Radiometric dating Radiocarbon Uranium—lead Potassium—argon Tephrochronology Luminescence dating Thermoluminescence dating. Christie M, et al. This is particularly important for very old samples. Articles from Britannica Encyclopedias for elementary and high school students. Carbon dating of ancient objects is particularly effective because c climreryde. Forum Users Search Support. The carbon exchange between atmospheric CO 2 and carbonate at the ocean surface is also subject to fractionation, with 14 C in the atmosphere more likely than 12 C to dissolve in the ocean.