Absolute triply differential cross sections for double photoionization of helium at 10, 20, and 52. 9 eV above threshold

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.R2676· OSTI ID:6451168

Pont, M; Shakeshaft, R ^[1]

---

1. Physics Department, University of Southern California, Los Angeles, California 90089-0484 (United States)

We have calculated the coplanar triply differential cross section (TDCS) for double ionization of helium by one photon at total energies of 10, 20, and 52.9 eV above threshold. Our results agree very well with recently measured and calculated angular distributions [O. Schwarzkopf, B. Kraessig, J. Elmiger, and V. Schmidt, Phys. Rev. Lett. [bold 70], 3008 (1993); O. Schwarzkopf, B. Kraessig, V. Schmidt, F. Maulbetsch, and J. S. Briggs, J. Phys. B [bold 27], L347 (1994); F. Maulbetsch and J. S. Briggs, [ital ibid]. [bold 26], L647 (1993)] for the cases of equal energy sharing (photoelectron energies [ital E][sub 1] and [ital E][sub 2], such that [ital E][sub 1]=[ital E][sub 2]=5 eV and [ital E][sub 1]=[ital E][sub 2]=10 eV) and unequal energy sharing ([ital E][sub 1]=5 eV, [ital E][sub 2]=47.9 eV). In contrast to previous calculations of the TDCS, our calculation is based on a basis-set method that is, in principle, exact, and we obtain [ital absolute] values of the TDCS that are fairly well converged with respect to the basis size.

• OSTI ID: 6451168
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:4; 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
ALPHA PARTICLES
CHARGED PARTICLES
CORRELATIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON CORRELATION
ELEMENTS
ENERGY RANGE
EV RANGE
FLUIDS
GASES
HELIUM
IONIZATION
NONMETALS
PHOTOIONIZATION
RARE GASES