High precision ~(14)C AMS at CIRCE

摘要

The CIRCE AMS system started operation in March 2005. The measurement of isotopic ratios 14C/12C in samples of archaeological and environmental interest has rapidly attained high precision and accuracy levels in routine operation. The results of the intercompar-ison campaign in the framework of the VIRI program, as well as the outcome of a statistical analysis of the about 200 control measurements performed with standard samples, have shown the capability of the whole system for high precision measurements (SR/R < 0.3%), allowing systematic investigations in both archaeological and environmental sciences. 26A1 AMS has been implemented for the measurement of the astrophysically relevant 25Mg(p,y)26Al reaction cross section, while a beam line is under construction for the measurement of actinides isotopic ratios.