Author:
Santiago M Marlucia F,Torquato Joaquim Raul,St Räde Heinz
Abstract
This date list covers a selection of 14C results of hydrologic samples investigated from January 1978 until August 1979. According to convention, the ages were calculated with a 14C half-life of 5568 yr and 0.95% of the activity of NBS oxalic acid standard and are quoted in years before 1950. The recent activity of water is assumed to be 90% modern (Geyh and Kreysing, 1973) and corrections for 12C/13C isotopic fractionation have not been made.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Archeology
Reference4 articles.
1. Geyh M A and Kreysing K , 1973, Sobre a idade das águas subterrâneas no polígono das secas do nordeste brasileiro: Rev Brasileira Geociěncias, v 3, p 53.
2. Barker Harold , 1953, Radiocarbon dating: large-scale preparation of acetylene from organic material: Nature, v 172, p 631–632.
3. Crathorn A R , 1953, Use of an acetylene-filled counter for natural radiocarbon: Nature, v 172, p 632–633.
4. Geyh M A , 1967, Experience gathered in the construction of low-level counters, in IAEA symposium, Proc: Monaco, 2-10 March 1967, p 575–591.