Autoionization as a tool for interpretation of x-ray absorption spectra: <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">N</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>/Ni(100)

A. Sandell; O. Björneholm; A. Nilsson; E. O. F. Zdansky; H. Tillborg; J. N. Andersen; N. Mårtensson

doi:10.1103/PhysRevLett.70.2000

Autoionization as a tool for interpretation of x-ray absorption spectra: $N_{2}$ /Ni(100)

A. Sandell, O. Björneholm, A. Nilsson, E. O. F. Zdansky, H. Tillborg, J. N. Andersen, and N. Mårtensson

Phys. Rev. Lett. 70, 2000 – Published 29 March 1993

Abstract

A new and general method to separate x-ray absorption (XA) features is presented. The XA spectrum is monitored by detailed recordings of autoionization data. The technique is applied to the $N_{2}$ /Ni(100)c(2×2) system, for which the N 1s 2π resonance is separated into the two components originating from the inequivalent nitrogen atoms. The XA peaks exhibit large differences in line shape, which is successfully explained in terms of the hybridization strengths of the XA final states. The total intensities of the XA peaks provide important information regarding the ground state of the adsorbed molecule.

Received 28 September 1992

DOI:https://doi.org/10.1103/PhysRevLett.70.2000

Authors & Affiliations

A. Sandell, O. Björneholm, A. Nilsson, E. O. F. Zdansky, H. Tillborg, J. N. Andersen, and N. Mårtensson

Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
Department of Synchrotron Radiation Research, Lund University, S-223 63 Lund, Sweden