Published October 18, 1982
| Version v1
Journal article
Double ionization of helium by protons and electrons at high velocities
Description
Double ionization of helium at high projectile velocities, v, is considered in terms of two mechanisms. In the shake-off mechanism the ratio of double to single ionization cross sections, sigma/sup i/i/sigma/sup i/, is independent of v. In the two-step mechanism it is shown that sigma/sup i/i/sigma/sup i/approx.(v2 lnv)-1. Combining amplitudes gives a reasonable fit to the observed velocity dependence as well as an explanation of the observed factor of 2 difference between double ionization of helium by protons and by electrons near vapprox. =10v/sub Bohr/
Additional details
Publishing Information
- Journal Title
- Phys. Rev. Lett.
- Journal Volume
- 49
- Journal Issue
- 16
- Series
- Phys. Rev. Lett.
- Journal Page Range
- 1153-1157
- ISSN
- 0031-9007
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14747612
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CROSS SECTIONS; ELECTRON-ATOM COLLISIONS; HELIUM; HYDROGEN IONS 1 PLUS; ION-ATOM COLLISIONS; IONIZATION; PROJECTILES; THEORETICAL DATA; VELOCITY
- Descriptors DEC
- ATOM COLLISIONS; CATIONS; CHARGED PARTICLES; COLLISIONS; DATA; ELECTRON COLLISIONS; ELEMENTS; HYDROGEN IONS; INFORMATION; ION COLLISIONS; IONS; NONMETALS; NUMERICAL DATA; RARE GASES