Non-dipolar angular distributions of Ne 2s and 2p valence photoelectrons

Journal Article · Wed May 01 04:00:00 EDT 1996 · Bulletin of the American Physical Society

OSTI ID:394298

Hemmers, O; Fisher, G; Glans, P ^[1]

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1. Univ. of Nevada, Las Vegas, NV (United States); and others

Non-dipolar angular-distribution parameters for valence photoemission have been measured for the first time. Results were obtained for the electric-quadrupole parameter {gamma} for Ne 2s photoemission and for the sum of {gamma} and the magnetic-dipole parameter {delta} for Ne 2p photoemission in the 900-1200 eV photon-energy range. Both valence lines exhibit stronger non-dipole effects than predicted by theory. In addition, the electric-dipole parameter {beta} was measured for Ne 2p photoemission between 650 and 1200 eV and does not agree with earlier data or theory. The presence of significant non-dipolar effects in valence photoemission at photon energies below 1 keV illustrates that these effects need to be accounted for; earlier experiments on atoms, molecules, and solids using soft-x-ray photons may need to be re-examined in light of these findings.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 394298
• Report Number(s): CONF-9605105--; CNN: Grant PHY-9393915
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
ELECTRON EMISSION
EV RANGE 100-1000
KEV RANGE 01-10
MULTIPOLARITY
NEON
PHOTOIONIZATION
SYNCHROTRON RADIATION