Double K-shell photoionization of neon

Journal Article · Sun Jun 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.062712· OSTI ID:20639763

Southworth, S H; Kanter, E P; Kraessig, B; Young, L; Armen, G B; Levin, J C; Ederer, D L; Chen, M H ^[1]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Double K-shell photoionization of Ne at 5000 eV was observed by recording the KK-KLL Auger-electron hypersatellite spectrum. The measured Auger spectrum is compared with the results of multiconfiguration Dirac-Fock calculations. Shake calculations are used to identify likely multivacancy states produced by photoexcitation or ionization in addition to double-K vacancies, and their calculated Auger spectra are compared with the measured spectrum. The measured relative intensities of hypersatellite and diagram Auger lines are combined with experimental and theoretical determinations of branching ratios from single- and double-K vacancies into final states to determine the ratio of double-to-single K-shell photoionization cross sections to be 0.32(4)%. This ratio is much larger than the calculated high-energy-limit ratio and indicates a large contribution of dynamic electron correlation.

• OSTI ID: 20639763
• Journal Information: Physical Review. A, Vol. 67, Issue 6; Other Information: DOI: 10.1103/PhysRevA.67.062712; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AUGER ELECTRON SPECTROSCOPY
BRANCHING RATIO
CROSS SECTIONS
DIAGRAMS
ELECTRON CORRELATION
ELECTRON SPECTRA
ELECTRONS
EV RANGE
K SHELL
NEON
PHOTOIONIZATION
VACANCIES