Apparatus for the Study of Electron Detachment Processes in Negatiave Ion - Atom and Molecule Collisions

摘要

This paper summarizes the main features of an apparatus constructed at the University of Toledo for the study of various scattering processes in intermediate energy, ion - atom collisions. The main purpose of this facility is to provide experimental data which serve as benchmarks to test current scattering theories for those processes. Recent measurements of single electron detachment (SED) and double electron detachment (DED) total cross sections for 5-50 keV H(sup -) ions incident on noble gases and for 10-50 keV H(sup -) ions incident on CH(sub 4) molecules were conducted in this laboratory. As a result of an analysis of the scattered beam growth curves, information about other charge-changing cross sections in the hydrogen-atom (molecule) collision systems were obtain, as well.