Single and double ionization of helium by high-energy photon impact
- Tennessee Univ., Knoxville, TN (United States). Dept. of Physics; Oak Ridge National Lab., TN (United States)
Production of singly and doubly charged helium ions by impact of keV photons is studied. The ratio $$R_{ph}$$ = $$\sigma_{ph}^{++}$$/$$\sigma_{ph}^+$$ for photoabsorption is calculated in the photon-energy range 2--18 keV using correlated initial- and final- state wave functions. Extrapolation towards symptotic photon energies yields $$R_{ph}$$($$\omega$$ → ∞) = 1.66% in agreement with previous predictions. Ionization due to Compton scattering, which becomes comparable to photoabsorption above ω ~ 3 keV, is discussed.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10187764
- Report Number(s):
- CONF-930711--3; ON: DE94000381
- Country of Publication:
- United States
- Language:
- English
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