Double K-shell photoionization and hypersatellite x-ray transitions of 12{<=}Z{<=}23 atoms

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.063408· OSTI ID:21528908

Hoszowska, J; Dousse, J -Cl; Cao, W; Fennane, K; Kayser, Y; Szlachetko, M; Szlachetko, J; Kavcic, M ^[1]

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1. Department of Physics, University of Fribourg, CH-1700 Fribourg (Switzerland)

Single-photon double K-shell ionization of low-Z neutral atoms in the range 12{<=}Z{<=}23 is investigated. The experimental method was based on measurements of the high-resolution K{alpha}{sup h} hypersatellite x-ray spectra following the radiative decay of the K-shell double-vacancy states excited by monochromatic synchrotron radiation. The photon energy dependence of the double K-shell ionization was measured over a wide range of photon energies from threshold up to and beyond the maximum of the double-to-single photoionization cross section ratios. From the high-resolution x-ray emission spectra the energies and linewidths of the hypersatellite transitions, as well as the K{alpha}{sub 1}{sup h}:K{alpha}{sub 2}{sup h} intensity ratios, were determined. The relative importance of the initial-state and final-state electron-electron interactions to the K-shell double photoionization is addressed. Physical mechanisms and scaling laws of the K-shell double photoionization are examined. A semiempirical universal scaling of the double-photoionization cross sections with the effective nuclear charge for neutral atoms in the range 2{<=}Z{<=}47 is established.

• OSTI ID: 21528908
• Journal Information: Physical Review. A, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevA.82.063408; (c) 2010 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC NUMBER
ATOMS
CROSS SECTIONS
ELECTRON-ELECTRON COLLISIONS
ELECTRON-ELECTRON COUPLING
ELECTRON-ELECTRON INTERACTIONS
EMISSION SPECTRA
ENERGY DEPENDENCE
K SHELL
LINE WIDTHS
MONOCHROMATIC RADIATION
PHOTOIONIZATION
PHOTONS
RADIATIVE DECAY
RESOLUTION
SCALING LAWS
SYNCHROTRON RADIATION
VACANCIES
X RADIATION
X-RAY SPECTRA
BOSONS
BREMSSTRAHLUNG
COLLISIONS
COUPLING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
INTERACTIONS
IONIZATION
IONIZING RADIATIONS
LEPTON-LEPTON INTERACTIONS
MASSLESS PARTICLES
PARTICLE DECAY
PARTICLE INTERACTIONS
POINT DEFECTS
RADIATIONS
SPECTRA