Schram, NormanHolden, PeterLanc, PeterAvila, JanainaArmstrong, RichardAmelin, YuriLatimore, AndrewCorrigan, DerekClement, StephenFoster, JohnCompston, WilliamIreland, Trevor2015-12-101387-3806http://hdl.handle.net/1885/69129Measurement of ion currents is fundamental to isotope ratio measurements. For small signals, discrete ion arrivals can be detected in pulse counting systems. This procedure works well until a few hundred thousand counts per second when dead time and gain201410.1016/j.ijms.2013.12.0202015-12-10