J. Phys. IV France 03 (1993) C6-69-C6-78
(e,2e) studies on cadmium autoionizing resonancesN.L.S. MARTIN1, D.B. THOMPSON1, R.P. BAUMAN1 and M. WILSON2
1 Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, U.S.A.
2 Physics Department, Royal Holloway, University of London, Egham, Surrey TW20 0EX, U.K.
We have measured (e, 2e) energy spectra in cadmium in the 4d95s25p J = 1 autoionizing region. The incident electron energy was 150 eV and the momentum transfer was K ≈ 0.2 a.u.. Differences in spectra taken at ejected-electron directions 180° apart were due to interference terms arising from coherent excitation of J = 1 and J = 0, 2 autoionizing levels and J = 0,2 continua. Ab initio spectroscopic calculations were carried out which enabled the extraction of relative excitation magnitudes and phases from the experimental data. The results are compared with PWBA calculations.
© EDP Sciences 1993