Electric-octupole and pure-electric-quadrupole effects in soft-X-Ray photoemission

Second-order [ O(k(2)), k = omega/c] nondipole effects in soft-x-ray photoemission are demonstrated via an experimental and a theoretical study of angular distributions of neon valence photoelectrons in the 100-1200 eV photon-energy range. A newly derived theoretical expression for nondipolar angula...

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Bibliographic Details
Published in:	Physical review letters Vol. 84; no. 10; pp. 2116 - 2119
Main Authors:	Derevianko, A, Hemmers, O, Oblad, S, Glans, P, Wang, H, Whitfield, SB, Wehlitz, R, Sellin, IA, Johnson, WR, Lindle, DW
Format:	Journal Article
Language:	English
Published:	United States 06-03-2000
Subjects:	ANGULAR DISTRIBUTION ANGULAR-DISTRIBUTION PARAMETERS APPROXIMATION ATOMIC AND MOLECULAR PHYSICS EXPERIMENTAL DATA NATURAL SCIENCES NATURVETENSKAP NEON OCTUPOLES PHOTOELECTRON SPECTROSCOPY PHOTOEMISSION PHOTOIONIZATION QUADRUPOLES THEORETICAL DATA X-RAY EMISSION ANALYSIS APPROXIMATION PHOTOIONIZATION ANGULAR-DISTRIBUTION PARAMETERS
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Summary:	Second-order [ O(k(2)), k = omega/c] nondipole effects in soft-x-ray photoemission are demonstrated via an experimental and a theoretical study of angular distributions of neon valence photoelectrons in the 100-1200 eV photon-energy range. A newly derived theoretical expression for nondipolar angular distributions characterizes the second-order effects using four new parameters with primary contributions from pure-quadrupole and octupole-dipole interference terms. Independent-particle calculations of these parameters account for a significant portion of the existing discrepancy between experiment and theory for Ne 2p first-order nondipole parameters.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.84.2116