Inner-shell photodetachment from Ru{sup -}

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.043434· OSTI ID:21450823

Dumitriu, I; Gorczyca, T W; Berrah, N ^[1]; Bilodeau, R C; Pesic, Z D; Rolles, D ^[1]; Walter, C W; Gibson, N D ^[2]

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1. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008 (United States)
2. Department of Physics and Astronomy, Denison University, Granville, Ohio 43023 (United States)

Inner-shell photodetachment from Ru{sup -} was studied near and above the 4p excitation region, 29-to-91-eV photon energy range, using a merged ion-photon-beam technique. The absolute photodetachment cross sections of Ru{sup -} ([Kr]4d{sup 7}5s{sup 2}) leading to Ru{sup +}, Ru{sup 2+}, and Ru{sup 3+} ion production were measured. In the near-threshold region, a Wigner s-wave law, including estimated postcollision interaction effects, locates the 4p{sub 3/2} detachment threshold between 40.10 and 40.27 eV. Additionally, the Ru{sup 2+} product spectrum provides evidence for simultaneous two-electron photodetachment (likely to the Ru{sup +} 4p{sup 5}4d{sup 6}5s{sup 2} state) located near 49 eV. Resonance effects are observed due to interference between transitions of the 4p electrons to the quasibound 4p{sup 5}4d{sup 8}5s{sup 2} states and the 4d{yields}{epsilon}f continuum. Despite the large number of possible terms resulting from the Ru{sup -} 4d open shell, the cross section obtained from a 51-state LS-coupled R-matrix calculation agrees qualitatively well with the experimental data.

• OSTI ID: 21450823
• Journal Information: Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.043434; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
ELECTRONS
ENERGY LEVELS
EV RANGE
EXCITATION
INTERFERENCE
L-S COUPLING
PHOTON BEAMS
PHOTONS
QUASIBOUND STATE
R MATRIX
RESONANCE
RUTHENIUM IONS
S WAVES
BEAMS
BOSONS
CHARGED PARTICLES
COUPLING
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FERMIONS
INTERMEDIATE COUPLING
IONS
LEPTONS
MASSLESS PARTICLES
MATRICES
PARTIAL WAVES