Abstract
A new experimental technique has been developed and used to measure cross sections for electron impact ionization of ions. Each single cross section is determined independently absolute by moving the electron gun mechanically across the ion beam with simultaneous registration of the ionization signal and the actual beam current. Different from the method of Brouillard et al. it is not necessary then to provide constant speed of the motion. Typical relative uncertainties of the measured cross sections are of the order of ±2% and absolute total errors are usually within ±6.5%. Very good agreement of ionization cross sections σ 1,2 measured with our new technique for Ar + ions is found with data from Harrison's group. Cross sections for single and multiple ionization of singly and multiply charged ions of Ar, Kr, Sb and Bi have been measured from threshold to 1000 eV.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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