Double photoionization of helium using many-body perturbation theory

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.1271· OSTI ID:6074326

Hino, K ^[1]; Ishihara, T; Shimizu, F; Toshima, N ^[2]; McGuire, J H ^[3]

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1. Department of Applied Physics and Chemistry, University of Electro-Communications, Chofu, Tokyo 182 (Japan) Atomic Physics Laboratory, Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)
2. Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305 (Japan)
3. Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)

Cross sections for double photoionization of He are calculated using the lowest-order many-body perturbation theory. There are three amplitudes contributing in the present calculation. They represent the three mechanisms for double ionization, namely, two-step-1, shake off, and ground-state correlation. It is explicitly shown that the cross section for each of these mechanisms depends strongly on the adopted form of the dipole interaction as indicated by Dalgarno and Sadeghpour [Phys. Rev. A 46, 3591 (1992)]. Our final results obtained by the sum of three amplitudes do not depend on the choice of the dipole formula at photon energies above 1 keV. The ratios of the cross sections for double ionization to single ionization are in excellent agreement with recent experimental results at energies 2--12 keV.

• OSTI ID: 6074326
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:2; ISSN PLRAAN; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
BATTERY CHARGE STATE
BRANCHING RATIO
CORRELATIONS
CROSS SECTIONS
DIPOLES
ELECTRON CORRELATION
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
GROUND STATES
HELIUM
IONIZATION
MANY-BODY PROBLEM
MULTIPOLES
NONMETALS
PERTURBATION THEORY
PHOTOIONIZATION
RARE GASES