ZERO-DEGREE HIGH-RESOLUTION TARGET AUTOIONIZATION SPECTRA OF HELIUM IN FAST E-, H-2+ COLLISIONS - LINE-PROFILES AND DOUBLE DIFFERENTIAL CROSS-SECTIONS(, HE+ AND HE)

Authors
WANG H BRUCH R HAO F FUELLING S XU Z WANG Z RAUSCHER E
Citation
H. Wang et al., ZERO-DEGREE HIGH-RESOLUTION TARGET AUTOIONIZATION SPECTRA OF HELIUM IN FAST E-, H-2+ COLLISIONS - LINE-PROFILES AND DOUBLE DIFFERENTIAL CROSS-SECTIONS(, HE+ AND HE), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 79(1-4), 1993, pp. 114-116
Citations number
13
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
79
Issue
1-4
Year of publication
1993
Pages
114 - 116
Database
ISI
SICI code
0168-583X(1993)79:1-4<114:ZHTASO>2.0.ZU;2-6
Abstract
Double excitation of helium by fast electrons, protons, He+ and He-2has been studied. High-resolution autoionization spectra and double di fferential cross sections from doubly excited (2s2)1S, (2p2)1D, (2s2p) P-1(o), (2p3p)1D, (2s3p)P-1(o), (2p4p)1D and (2s4p)P-1(o) states have been measured for an observation angle of zero degree as a function of the impact velocity and projectile charge. The transition amplitudes for direct ionization and resonance ionization strongly interfere and depend on the three-particle Coulomb interaction in the final state.