Single ionization of helium by 40–3000-keV antiprotons
- 1 June 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 41 (11) , 6536-6539
- https://doi.org/10.1103/physreva.41.6536
Abstract
Measurements of single-ionization cross sections for antiproton impact on helium atoms are reported for impact energies ranging from 40 keV to 3 MeV. It is found that the measured cross sections are in good agreement with recent theoretical estimates based on the continuum-distorted-wave approximation. From a comparison with similar proton data, the ratio between antiproton and proton results is obtained. The energy dependence of this ratio is compared with various theoretical estimates and explained as a result of polarization and binding effects.Keywords
This publication has 16 references indexed in Scilit:
- Further studies of double ionization of He, Ne, and Ar by fast and slow antiprotonsPhysical Review A, 1989
- Comparison of single-electron removal processes in collisions of electrons, positrons, protons, and antiprotons with hydrogen and heliumPhysical Review A, 1989
- Multiple ionization of He, Ne, and Ar by fast protons and antiprotonsPhysical Review A, 1987
- effects in the ionization of helium by ion impactPhysical Review A, 1987
- The forced impulse method applied to the double ionisation of helium by collision with high-energy protons, antiprotons and alpha particlesJournal of Physics B: Atomic and Molecular Physics, 1987
- Collisional mechanisms for single and double ionization of He by protons and antiprotonsPhysical Review A, 1987
- Single and Double Ionization of Helium by Fast Antiproton and Proton ImpactPhysical Review Letters, 1986
- Electron production in proton collisions: total cross sectionsReviews of Modern Physics, 1985
- Single and double ionisation of helium by H+, He2+and Li3+ionsJournal of Physics B: Atomic and Molecular Physics, 1985
- An experimental investigation of double ionisation of helium atoms in collisions with fast, fully stripped ionsJournal of Physics B: Atomic and Molecular Physics, 1984