0000000000358806

AUTHOR

J R Götz

showing 2 related works from this author

Cross-sections for (e, 3e) collisions on helium: the DS6C wavefunction

2006

A dynamically screened product of six pairwise Coulomb functions (DS6C) is used as an analytic approximation to describe the four-body Coulomb continuum state produced by electron-impact full fragmentation of helium. Good agreement is obtained with experimental data close to threshold, where four-body effects are expected to be important. Even for the high impact energy of 640 eV, four-body effects still play a role in deciding the shape of multi-differential cross-sections.

PhysicsContinuum (measurement)chemistry.chemical_elementCondensed Matter PhysicsAtomic and Molecular Physics and OpticschemistryFragmentation (mass spectrometry)CoulombImpact energyAtomic physicsBasso continuoWave functionHeliumElectron ionizationJournal of Physics B: Atomic, Molecular and Optical Physics
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The effect of dynamical screening on helium (e, 3e) differential cross-sections

2005

A simplified derivation of dynamic screening in the case of three Coulomb-interacting particles in the continuum is given and applied to describe the shapes of multi-differential cross-sections for the (e, 3e) process on the helium atom in which the incident fast electron is treated in first-order Born approximation. A very good agreement with experimental multi-differential cross-sections is obtained for two slow ejected electrons (specifically both electrons have 5 eV) but the strategy appears to be breaking down at intermediate emission energies.

PhysicsDynamic screeningHelium atomchemistry.chemical_elementElectronCondensed Matter PhysicsAtomic and Molecular Physics and Opticschemistry.chemical_compoundchemistryBasso continuoAtomic physicsBorn approximationElectron ionizationHeliumJournal of Physics B: Atomic, Molecular and Optical Physics
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