Inner-Shell Photodetachment of Iron and Ruthenium Negative Ions

ORAL

Abstract

Transition metals such as Ru and Fe are of wide application in oceanography, cosmochemistry, and geology due to their catalytic properties and participation of d-orbital electrons in their bonding properties. The first inner-shell photodetachment studies in Fe$^{-}$ and Ru$^{-}$ conducted using the Ion Photon Beamline (IPB) on ALS beamline10.0.1 will be presented. The negative ions extracted from the SNICS ion source are mass selected and merged collinearly with the photon beam. Inner-shell photodetachment and subsequent Auger decay produce positive ions which are detected as a function of photon energy over a range of 48 to 72 eV. Excitations from p-electrons to open d-shells were carried out in both Fe$^{-}$ and Ru$^{-}$. Two shapes resonances were observed in Fe$^{-}$ and no clear resonance was observed in Ru$^{-}$. The absolute cross-section for the production of Fe$^{+}$ and Ru$^{+}$ will also be presented.

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Authors

  • Ileana Dumitriu

    Physics Department WMU, Kalamazoo, MI

  • R.C. Bilodeau

    Physics Dept. - Western Michigan University and ALS - LBNL, ALS, LBLN, Berkeley, CA and WMU, Kalamazoo, MI

  • T. Gorczyca

    Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, Department of Physics, Western Michigan University, Kalamazoo, MI 49008-5252, Physics Department WMU, Kalamazoo, MI

  • C.W. Walter

    Physics Department Denison University, OH

  • N.D. Gibson

    Physics Department Denison University, OH

  • A. Aguilar

    ALS, LBLN, Berkeley, CA, Advanced Light Source, LBNL

  • Z. Pesic

    ALS, LBLN, Berkeley, CA and WMU, Kalamazoo, MI

  • D. Rolles

    ALS, LBLN, Berkeley, CA and WMU, Kalamazoo, MI

  • N. Berrah

    Physiscs Department WMU, Kalamazoo, MI