Lyon Natural Radiocarbon Measurements VIII

Autor:	J Evin, G Marien, C Pachiaudi
Rok vydání:	1979
Předmět:	010506 paleontology Archeology 060102 archaeology General Earth and Planetary Sciences 0601 history and archaeology 06 humanities and the arts 01 natural sciences 0105 earth and related environmental sciences
Zdroj:	Radiocarbon. 21:405-452
ISSN:	1945-5755 0033-8222
DOI:	10.1017/s0033822200004562
Popis:	This list includes most of the measurements made in 1977 and 1978 using the two Packard liquid scintillation spectrometers described in Lyon VII (R, 1978, v 20, p 19). The backgrounds of both spectrometers decreased by about 30% with new photomultipliers, giving 1.9 ± 0.1cpm and 2.4 ± 0.2 cpm, respectively, for 3ml C6H6(depending on counting vessels). Proportional detectors are only used for very small samples. Counting procedures are described in the text. Dilution ratios indicate the amount of sample versus the total quantity of C6H6or CO2introduced in the detectors. No change was made either in chemical treatment or in the calculation method (half-life: 5570 ± 0, one standard deviation, standard13C correction only for bones).
Databáze:	OpenAIRE
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