DISSOCIATIVE ATTACHMENT STUDIES BY NEGATIVE-ION TIME-OF-FLIGHT MASS-SPECTROMETRY

Experiments using time-of-flight mass spectrometry for studying the fo rmation of negative ions in dissociative attachment processes by elect ron impact are discussed. The problems of making accurate measurements of absolute partial cross-sections have been solved using a combinati on of a new pulsed-electron-beam/pulsed-ion-extraction technique, the relative flow technique and a time-of-flight mass spectrometer. We als o discuss some of the results obtained utilizing this method.