Results 261 to 270 of about 64,269 (303)
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Annals of Internal Medicine, 1963
Abstract The cosmic ray production of new atoms in m atter is the basis of radiocarbon dating. In this case the atom is carbon of mass fourteen made from the most abundant atom in air—nitrogen of mass fourteen. Radiocarbon— carbon-14, 14C—lasts 8300 years on the average (see note on radioactive decay on p.
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Abstract The cosmic ray production of new atoms in m atter is the basis of radiocarbon dating. In this case the atom is carbon of mass fourteen made from the most abundant atom in air—nitrogen of mass fourteen. Radiocarbon— carbon-14, 14C—lasts 8300 years on the average (see note on radioactive decay on p.
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Topics in Current Chemistry, 2012
Although most historians and art historians consider the radiocarbon dating technique not to be very precise by their criteria, the method has gained much importance over the last decades. Radiocarbon dating is increasingly used in the field of textile research and old polychrome statues, but also objects made of ivory, stucco, paper, and parchment are
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Although most historians and art historians consider the radiocarbon dating technique not to be very precise by their criteria, the method has gained much importance over the last decades. Radiocarbon dating is increasingly used in the field of textile research and old polychrome statues, but also objects made of ivory, stucco, paper, and parchment are
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Radiocarbon Dating of Takabuti
2021The objective of the 21st century research was to learn more about the life and times of Takabuti through the application of modern scientific techniques. Based on the style of her coffin, early scholarship had indicated that Takabuti lived around 600 BCE; using samples of hair and bandage from the mummy, AMS radiocarbon dating was employed to test the
Reimer, P.J., Metcalfe, Jenefer
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Radiocarbon Mechanism of Aging
Rejuvenation Research, 2006A hypothetical mechanism of 14 C-generated influence on a person's rate of aging is offered. The mathematical description and the following approbation of the radiocarbon mechanism of aging made it possible to coordinate the Gompertz and Strehler-Mildvan laws and ...
Alexander M, Germansky +1 more
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Radiocarbon dating in trondheim
Applied Scientific Research, 1957Naturally occurring radiocarbon is registered in a proportional counter filled with pure CO2. The CO2 gas is purified in almost the same manner as has been developed by De Vries and Barendsen. Checking of the gas purity is described. A grid proportional counter with an effective volume of about 2.5 liter has been used with CO2-pressures from 1 to 4 ...
R. Nydal, R. S. Sigmond
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Preparation of Bone Samples in the Gliwice Radiocarbon Laboratory for AMS Radiocarbon Dating
Isotopes in Environmental and Health Studies, 2002In the Gliwice Radiocarbon Laboratory, a system for preparation of samples for AMS dating has been built. At first it was used to produce graphite targets from plant macrofossils and sediments. In this study we extended its capabilities with the preparation of bones.
Tomasz Goslar, Natalia Piotrowska
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Nature, 1970
CONFLICTING reports have been published in recent years on the reliability of radiocarbon dating of mortars. Delibrias and Labeyrie1 found accurate dating to be possible, but Stuiver and Smith2 found incorrect age assessments. The observed discrepancies were attributed to the dilution of 14C activity by ancient carbon which may have been a residue of ...
M S, Baxter, A, Walton
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CONFLICTING reports have been published in recent years on the reliability of radiocarbon dating of mortars. Delibrias and Labeyrie1 found accurate dating to be possible, but Stuiver and Smith2 found incorrect age assessments. The observed discrepancies were attributed to the dilution of 14C activity by ancient carbon which may have been a residue of ...
M S, Baxter, A, Walton
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Preparation for Radiocarbon Analysis
2016This chapter presents an overview of the steps required to prepare a sample for radiocarbon (14C) measurement by accelerator mass spectrometry (AMS). These include: (1) collection of an appropriate sample that can answer the question being asked; (2) pretreatment of samples to isolate a the most representative fraction of the bulk carbon (C) or to ...
Trumbore, S. +9 more
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Hadashot Arkheologiyot - Excavations and Surveys in Israel, 2013
In January 2010, a salvage excavation was conducted in Nahal Hed, west of the Ramat Hovav Industrial Area (Permit No. A-5803; map ref. 175218-433/561015-440). The excavation undertaken on behalf of the Israel Antiquities Authority and funded by the Israel Bromide CompoundsCompany ...
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In January 2010, a salvage excavation was conducted in Nahal Hed, west of the Ramat Hovav Industrial Area (Permit No. A-5803; map ref. 175218-433/561015-440). The excavation undertaken on behalf of the Israel Antiquities Authority and funded by the Israel Bromide CompoundsCompany ...
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RADIOCARBON DATING | Conventional Method
2007Radiometric analysis of carbon-14 (14C) by liquid scintillation counting (LSC) and gas proportional counting (GPC) is reviewed. Typical sample size requirements are discussed, together with the conversion of sample carbon to an appropriate product for the measurement of the β-particles emitted during 14C decay; in the case of LSC, it is benzene (C6H6 ...
Cook, C.T, van der Plicht, J.
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