Structure in the Differential Charge-State Fractions of He Following Ionization by Fast Protons
- 16 May 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 60 (20) , 2018-2021
- https://doi.org/10.1103/physrevlett.60.2018
Abstract
The differential cross sections for double and single ionization and the corresponding charge-state fractions of He resulting from impact of fast protons have been measured as functions of both the scattering angle (0.25-4.1 mrad) and the impact energy (300-1000 keV) of the proton. The differential cross sections smoothly decrease with the scattering angle, but the fraction of doubly charged ions, , exhibits a distinct peak at ≅0.9 mrad. This peak is not easily explained in terms of the single- and double-ionization mechanisms thought to operate at these energies.
Keywords
This publication has 19 references indexed in Scilit:
- Scattering correlation in double ionization of helium by fast antiprotons and protonsPhysical Review A, 1988
- Multiple ionization of He, Ne, and Ar by fast protons and antiprotonsPhysical Review A, 1987
- Interference between direct and rearrangement mechanisms for double ionizationPhysical Review A, 1987
- Collisional mechanisms for single and double ionization of He by protons and antiprotonsPhysical Review A, 1987
- Ionization of helium by highly charged ions at 1.4 MeV/amuPhysical Review A, 1987
- Double ionization of helium by protons and antiprotons in the energy range 0.30 to 40 MeVPhysical Review Letters, 1987
- Single and Double Ionization of Helium by Fast Antiproton and Proton ImpactPhysical Review Letters, 1986
- Single and double ionisation of helium by H+, He2+and Li3+ionsJournal of Physics B: Atomic and Molecular Physics, 1985
- Double Ionization of Helium by Protons and Electrons at High VelocitiesPhysical Review Letters, 1982
- Analysis of RecoilandIons Produced by Fast Protons in Helium GasPhysical Review A, 1970