The Application of an Electron Multiplier Mass Spectrometer to the Isotopic Analysis of Rhodium, Columbium, and Cerium |
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4KTR abundance amplitude analyzer chamber apparatus ATOMIC MASS UNITS average number capacitance CENCO CERIUM charge collector slit Columbium condenser counting circuit counting rate d-c amplifier direct current due to shot dynode electrometer tube amplifier electron beam electron multiplier equal equation f to f FF1 and FF2 fluctuation factor focusing fraction frequency band f furnace galvanometer deflection grid circuit grid resistor height input resolving Inst integral intensity ion accelerating potential ion current ion source ion striking isotopes large peaks leakage loss magnetic field mass numbers mass spectrometer mass spectrum mean-square voltage measured multiplier anode current multiplier gain multiplier output Nichrome Nier noise voltage number of counts ohms Phys plotting pre-amplifier stage pulse amplifier pulse counting pulse rate resistance rhodium secondary emission shown in Fig slit S2 surface thermal noise thermionic voltage dividers voltage drop voltage pulse voltage sensitivity volts w²R²C² ww ww zero