O Hemmers et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L727 doi:10.1088/0953-4075/30/21/003
Beyond the dipole approximation: angular-distribution effects in valence photoemission
O Hemmers
, G Fisher, P Glans, D L Hansen, H Wang, S B Whitfield, R Wehlitz
, J C Levin, I A Sellin, R C C Perera§, E W B Dias||, H S Chakraborty||, P C Deshmukh||, S T Manson¶ and D W Lindle
LETTER TO THE EDITOR
Angular distributions of valence photoelectrons showing effects due to higher-multipole photon interactions have been measured for the first time. Neon 2s and 2p photoemission exhibits effects beyond the dipole approximation throughout the 250 - 1200 eV photon-energy range studied. The results suggest that any photoemission experiment, on any sample, can be affected at relatively low photon energies, pointing to a general need for caution in interpreting angle-resolved-photoemission measurements.
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Issue 21 (14 November 1997)
Received 5 August 1997, in final form 25 September 1997
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Beyond the dipole approximation: angular-distribution effects in valence photoemission
O Hemmers et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L727
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