Electron Emission of CuBe on Bombardement with Parent and Fragment Ions of Ammonia and Phosphine

Abstract

Abstract The secondary electron emission of the first dynode of a CuBe-alloy sixteen dynode electron multiplier has been studied in the course of electron impact ionization studies of ammonia and phosphine. Relative secondary electron emission coefficients have been obtained for the singly and doubly charged parent and fragment ions of ammonia. ammonia-d3, phosphine and phosphine-d3 for kinetic energies of 5.25 and 10.5 keV. It has been found that in general deuterated ions have smaller γ coefficients than protonated ions, that ammonia ions have larger γ coefficients than phosphine ions, and that the γ coefficient increases with the complexity of the ion under study.