To meet the measurement demands on small-mass radiocarbon (carbon content at 10-6g level) which are becoming increasingly significant. Xi'an-AMS has made improvement to the existing method of sample loading and has upgraded the Cs sputter ion source from the original SO-110 model. In order to study the feasibility of small-mass samples in Xi'an-AMS and evaluate the radiocarbon sample preparation ability using existing routine systems of H2/Fe and Zn/Fe, the small-mass samples prepared by four different methods are tested. They are mass division method, mass dilution method, H2/Fe reduction method and Zn/Fe reduction method. The results show that carbon mass above 25ug can be prepared using the existing Zn/Fe system, but no less than 100ug is required using the existing H2/Fe system, which can be improved. This indicates Xi'an-AMS are now able to analyze small-mass radiocarbon samples.
@article{arxiv.1409.0633,
title = {A preliminary study of small-mass radiocarbon sample measurement at Xi'an-AMS},
author = {Fu Yun-Chong and Zhou Wei-Jian and Du Hua and Cheng Peng and Zhao Xiao-Lei and Liu Qi and Lu Xue-Feng and Zhao Wen-nian},
journal= {arXiv preprint arXiv:1409.0633},
year = {2014}
}