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VOLUME 31 (1980) | ISSUE 1 | PAGE 42
Spectroscopic investigation of the production of doubly charged rubidium and cesium ions by electron-ion collisions
The process of s ionization of rubidium and cesium ions by electron collision was studied for the first time in colliding beams by detecting ultrasoft χ rays (USX). A narrow resonance, which can be explained by the capture of a bombarding electron with a simultaneous excitation of s and ρ electrons of the outer shell of these ions, was observed near the threshold of the excitation of the USX radiation. The effective cross sections of s ionization in the maximum are 3 X10 ~17 cm2 for Rb + and 5 X10 ~17 cm2forCs + .