A comparison using Faraday cups with 1013 Ω amplifiers and a secondary electron multiplier to measure Os isotopes by negative thermal ionization mass spectrometry

Gui-Qin Wang, GIG Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China and Ji-Feng Xu, Guilin University of Technology, Guilin, China; School of Earth Science and Resources, China University of Geosciences, Beijing, China