Year: 1968
Type: article
Abstract: Collisions involving one-electron capture and loss during the passage of 60-450 kev helium beams through hydrogen have been investigated by a technique which allows the fast metastable atom population of the beam to be determined. One-electron loss cross sections σ 0 * 1 and σ 01 for metastable and ground-state helium atoms have been separately determined. σ 0 * 1 is found to be between 13 and 3 times greater than σ 01 in the present energy range. It is shown that at energies between 80 and 250 kev, where the formation of He 2+ is relatively unlikely, a satisfactory description of the charge equilibration of fast helium beams can be obtained in terms of charge-changing collisions involving He + ions and ground-state and metastable helium atoms. Cross sections σ 10 and σ 10 * for one-electron capture into metastable and ground states of helium have been estimated in the range 75-250 kev where it is found that σ 10 * is between 30% and 50% of σ 10 .
Authors: H B Gilbody, R Browning, G Levy, A I McIntosh, K F Dunn
Institution: Queen's University Belfast
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2044249208