Beyond the dipole approximation: angular-distribution effects in valence photoemission
O. HemmersDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAG. B. FisherDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAP. GlansDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAD. L. HansenDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAH WangDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAS. B. WhitfieldDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USAR. WehlitzDepartment of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996-1200, USAJ. C. LevinDepartment of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996-1200, USAI. A. SellinDepartment of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996-1200, USAR. C. C. PereraAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USAE. W. B. DiasDepartment of Physics, Indian Institute of Technology-Madras, Madras-600036, IndiaHimadri ChakrabortyDepartment of Physics, Indian Institute of Technology-Madras, Madras-600036, IndiaP. C. DeshmukhDepartment of Physics, Indian Institute of Technology-Madras, Madras-600036, IndiaSteven T. MansonDepartment of Physics, Georgia State University, Atlanta, GA 30303, USAD. W. LindleDepartment of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USA
1997en
ABI
Abstract
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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