What is "radiocarbon"

Usage examples of "radiocarbon".

If the radiocarbon dates were correct, Monte Verde was older than both the Llano and Nenana complexes by at least 1,000 years.

Later, as the excavation progressed, radiocarbon dates of at least 38,000 years were announced for charcoal from the hearths.

Increasingly today, archaeologists are circumventing this problem by a new technique termed accelerator mass spectrometry, which permits radiocarbon dating of tiny samples and thus lets one directly date a single small seed, small bone, or other food residue.

Buses, trucks, station wagons, special trains, and every manner of transport except dog sleds, brought in the Wonders of the Invisible World, Maule's Curse, the Jesus Head Trip, Ahab and His Amputation, the Horseless Headsmen, the Leaves of Grass, the Gettysburg Address, the Rosy-Fingered Dawn, the Wine-Dark Sea, Nirvana, the Net of Jewels, Here Comes Everybody, the Pisan Cantos, the Snows of Yesteryear, the Pink Dimension, the Goose in the Bottle, the Incredible Hulk, the Third Bardo, Aversion Therapy, the Irresistible Force, MC Squared, the Enclosure Acts, Perpetual Emotion, the 99-Year Lease, the Immovable Object, Spaceship Earth, the Radiocarbon Method, the Rebel Yell, the Clenched Fist, the Doomsday Machine, the Rand Scenario, the United States Commitment, the Entwives, the.

A second problem in radiocarbon dating is that the carbon 14/carbon 12 ratio of the atmosphere is in fact not rigidly constant but fluctuates slightly with time, so calculations of radiocarbon dates based on the assumption of a constant ratio are subject to small systematic errors.

After eight half-lives, only 1/256 of the original radioactive carbon remains, which is too little to make a reliable measurement, so radiocarbon dating works only for objects up to forty thousand or so years old.

Allowing for the slight inaccuracies that are inevitable in radiocarbon dating, it's still altogether permissible to propose that in fact they took place exactly two thousand and forty-nine years apart.

Employing sophisticated methods of radiocarbon dating and plant genetics, many scholars from various fields of science concur in the conclusion that Man's first farming venture was the cultivation of wheat and barley, probably through the domestication of a wild variety of emmer.

One is that radiocarbon dating until the 1980s required relatively large amounts of carbon (a few grams), much more than the amount in small seeds or bones.

The space lattice collapses, and each element breaks down into free hydrogen, free neutrons and radiocarbon.