Department of Earth Sciences at the University of Rome Radiocarbon Dates II

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

DATAZIONI RADIOCARBONIO

NOTE ILLUSTRATIVE DELLA CARTA GEOLOGICA D'ITALIA ALLA SCALA 1:50.000 (F.glio 065, MANIAGO. DATAZIONI ISOTOPICHE - DATAZIONI RADIOCARBONIO. DIPARTIMENTO DIFESA DEL SUOLO-SERVIZIO GEOLOGICO D'ITALI

DATAZIONI ISOTOPICHE C-14

CONTRIBUTO ALLE NOTE ILLUSTRATIVE DELLA CARTA GEOLOGICA D'ITALIA ALLA SCALA 1:50.000, FOGLIO 066: UDINE. DIPARTIMENTO DIFESA DEL SUOLO - SERVIZIO GEOLOGICO D'ITALI

DATAZIONE DI PALEOSUOLI AL RADIOCARBONIO

CNR PROGETTO FINALIZZATO BENI CULTURAL

Department of Earth Sciences at the University of Rome Radiocarbon Dates I

We report here, in part, dates measured on samples from Italy since the construction of a new 14C lab in 1990 for research in the fields of geology, paleomorphology and the biogeochemical cycle of carbon. We use liquid scintillation counting (LSC), following sample conversion to benzene through the four classical chemical steps: 1) combustion or hydrolysis to CO2; 2) production of Li2C2; 3) hydrolysis to C2H2; 4) trimerization of acetylene to C6H6 with specific catalysts. The vacuum line for benzene synthesis has been designed following a comparative review of the literature (Tamers 1960; Noakes et al. 1963; Scharpenseel & Pietig 1970; Harkness & Wilson 1973; Polach, Gower & Fraser 1972; Gupta & Polach 1985), and the valuable suggestions of many colleagues from well-established labs abroad. The compact vacuum line is mostly modular with “O”-ring-joined components, and is equipped with greaseless stopcocks. We use commercial two-stage rotary pumps, pressure transducers and gauges; an electrovalve coupled with a pressure control unit supplies the purified oxygen for sample combustion while holding constant, just higher than 1 atm, the gas pressure inside the combustion tube.This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202