Cross-section ratio of double to single ionization of helium by Compton scattering of 40-100-keV x rays

Citation
L. Spielberger et al., Cross-section ratio of double to single ionization of helium by Compton scattering of 40-100-keV x rays, PHYS REV A, 59(1), 1999, pp. 371-379
Citations number
35
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
10502947 → ACNP
Volume
59
Issue
1
Year of publication
1999
Pages
371 - 379
Database
ISI
SICI code
1050-2947(199901)59:1<371:CRODTS>2.0.ZU;2-9
Abstract
We have measured the ratio of cross sections for double to single ionizatio n of helium by Compton scattering, R-C = sigma(C)(++)/sigma(C)(+), at photo n energies of 40, 80, and 100 keV using cold target recoil-ion momentum spe ctroscopy. Comparison with calculations involving highly correlated initial states and approximate final states with and without final-state correlati ons, represented by 3C and 2C wave functions respectively, shows that the i nfluence of final-state correlations persists to very high photon energies. A comparison with recent charged-particle data is made. [S1050-2947(99)047 01-0].