Beyond archaeology: 14C-AMS and the global carbon cycle
G. M. dos Santos 1*
1 Keck Carbon Cycle AMS Laboratory, University of California, Irvine, CA 92697-3100, USA, www.ess.uci.edu/AMS
The Keck Carbon Cycle Accelerator Mass Spectrometer (KCCAMS) facility is specialized in using radiocarbon (14C) as a tracer of the global carbon cycle, by measuring natural and anthropogenic carbon from natural waters, soils, sediments, the atmosphere, and biota. In this work an overview of our compact accelerator mass spectrometer (AMS) system, and brief description of a series of technical modifications that allow us to obtain high beam current output from the ion-source (~225 µA of 12C-) and achieve high precision (0.2-0.3%), with minimum downtime for maintenance will be provided. General requirements of 14C-AMS sample preparation will be discussed as well as applications in Environmental Science, including recent advancements allowing the measurement of very small samples (less than 0.100mg of carbon).