Contribution of Compton scattering to the double ionization of helium

Journal Article · Mon Mar 14 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.1620· OSTI ID:5003264

Hino, K; Bergstrom, Jr, P M; Macek, J H ^[1]

---

1. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

Double ionization of helium by single-photon impact is analyzed for photon energies from 4 to 12 keV. Many-body perturbation theory is applied to obtain the Compton scattering contribution to the total cross section for double ionization. Compton scattering dominates photoionization above 6 keV. Despite the differences between the two processes, the ratio of double to single ionization by Compton scattering appears to approach the asymptotic value given by photoionization calculations. These ratios are in agreement with recent experiments.

• OSTI ID: 5003264
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:11; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
BASIC INTERACTIONS
CHARGE STATES
COMPTON EFFECT
CROSS SECTIONS
DATA
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTS
FLUIDS
GASES
HELIUM
INFORMATION
INTERACTIONS
IONIZATION
MANY-BODY PROBLEM
MULTIPOLES
NONMETALS
NUMERICAL DATA
PERTURBATION THEORY
PHOTOIONIZATION
RARE GASES
SCATTERING
THEORETICAL DATA
TOTAL CROSS SECTIONS