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

Authors
ANDERSSON LR BURGDORFER J
Citation
Lr. Andersson et J. Burgdorfer, EXCITATION IONIZATION AND DOUBLE-IONIZATION OF HELIUM BY HIGH-ENERGY PHOTON IMPACT, Physical review letters, 71(1), 1993, pp. 50-53
Citations number
24
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
1
Year of publication
1993
Pages
50 - 53
Database
ISI
SICI code
0031-9007(1993)71:1<50:EIADOH>2.0.ZU;2-K
Abstract
The ratio of double to single ionization by photoabsorption is calcula ted for photon impact energies in the range 2-18 keV. Employing the ac celeration form of the dipole operator and representing the electron-e lectron correlation in the final state by a Coulomb distortion factor, R=sigma++/sigma+ approaches an asymptotic value of 1.66% and reaches a value of about 2.5% at 2 keV photon energy. Comparison with experime ntal data shows good agreement when contributions due to Compton scatt ering are taken into account.