SINGLE AND DOUBLE-IONIZATION OF HELIUM BY HIGH-ENERGY PHOTON IMPACT

Authors
ANDERSSON LR BURGDORFER J
Citation
Lr. Andersson et J. Burgdorfer, SINGLE AND DOUBLE-IONIZATION OF HELIUM BY HIGH-ENERGY PHOTON IMPACT, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 87(1-4), 1994, pp. 167-172
Citations number
24
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
87
Issue
1-4
Year of publication
1994
Pages
167 - 172
Database
ISI
SICI code
0168-583X(1994)87:1-4<167:SADOHB>2.0.ZU;2-#
Abstract
Production of singly and doubly charged helium ions by impact of keV p hotons is studied. The ratio R(ph) = sigma(ph)++/sigma(ph)+ for photoa bsorption is calculated in the photon-energy range 2-18 keV using corr elated initial- and final-state wave functions. Extrapolation towards asymptotic photon energies yields R(ph)(omega --> infinity) = 1.66% in agreement with previous predictions. Ionization due to Compton scatte ring, which becomes comparable to photoabsorption above omega approxim ately 3 keV, is discussed.