Probing electron correlations in double photoionization of He at intermediate energies

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

DOI:https://doi.org/10.1103/PhysRevA.48.R1733· OSTI ID:6242797

Berrah, N; Heiser, F; Wehlitz, R; Levin, J; Whitfield, S B; Viefhaus, J; Sellin, I A; Becker, U ^[1]

---

1. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin (Germany) Physics Department, Western Michigan University, Kalamazoo, Michigan 49009 (United States) National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States) Physics Department, University of Tennessee, Knoxville, Tennessee 37996 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37891 (United States)

The ratio of double-to-single ionization of He has been measured between 280 and 1210 eV to investigate its behavior in this partially unexplored region. These measurements, compared with the most recent theories of Pan and Kelly (private communication) and of Hino [Phys. Rev. A 47, 4845 (1993)], show the importance of including not only ground-state but also final-state correlations, in contrast to the high-energy behavior discussed by Dalgarno and Sadeghpour [Phys. Rev. A 46, R3591 (1992)] where consideration of final-state correlations proves inessential. Our intermediate-energy results also appear to indicate the importance of including higher-order effects in the theory.

• OSTI ID: 6242797
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:3; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
CROSS SECTIONS
ELECTRON CORRELATION
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EV RANGE
FLUIDS
GASES
HELIUM
IONIZATION
MANY-BODY PROBLEM
NONMETALS
PHOTOIONIZATION
RARE GASES
TWO-BODY PROBLEM