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Title: Outstanding Spin-Orbit-Activated Interchannel Coupling in the Cs and Ba 3d Photoemission

Abstract

Partial 3d{sub 5/2} photoionization cross sections of atomic Cs and Ba as well as the asymmetry parameter {beta} of the angular distribution of the Cs 3d{sub 5/2} photoelectrons were investigated near the threshold of the 3d{sub 3/2} channel at about 750 eV and 800 eV, respectively. Strong electron correlations, in particular, the spin-orbit activated interchannel coupling between the 3d{sub 5/2} and 3d{sub 3/2} channels, govern the observed spectra. The most striking effect was found for {beta}{sub 5/2} of Cs with a dramatic increase from {beta}=1.0 to {beta}=1.5 in the energy region where the mixing between both channels causes a pronounced minimum in the partial 3d{sub 5/2} cross section. This result indicates the decisive influence of the interference term on the asymmetry parameter {beta} with its dependence on the phase difference between the outgoing p and f waves.

Authors:
; ;  [1];  [2];  [3]; ;  [4]
  1. Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, 10623 Berlin (Germany)
  2. BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin (Germany)
  3. Science Faculty, Physics Department, Istanbul University, 34118 Vezneciler/Istanbul (Turkey)
  4. LIXAM, Centre Universitaire Paris-Sud, Batiment 350, 91405 Orsay Cedex (France)
Publication Date:
OSTI Identifier:
20951208
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevLett.98.143002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; ASYMMETRY; BARIUM; CESIUM; CROSS SECTIONS; ELECTRON CORRELATION; EV RANGE 100-1000; F WAVES; INTERFERENCE; L-S COUPLING; P WAVES; PHOTOEMISSION; PHOTOIONIZATION

Citation Formats

Richter, T., Heinecke, E., Zimmermann, P., Godehusen, K., Yalcinkaya, M., Cubaynes, D., and Meyer, M.. Outstanding Spin-Orbit-Activated Interchannel Coupling in the Cs and Ba 3d Photoemission. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.143002.
Richter, T., Heinecke, E., Zimmermann, P., Godehusen, K., Yalcinkaya, M., Cubaynes, D., & Meyer, M.. Outstanding Spin-Orbit-Activated Interchannel Coupling in the Cs and Ba 3d Photoemission. United States. doi:10.1103/PHYSREVLETT.98.143002.
Richter, T., Heinecke, E., Zimmermann, P., Godehusen, K., Yalcinkaya, M., Cubaynes, D., and Meyer, M.. Fri . "Outstanding Spin-Orbit-Activated Interchannel Coupling in the Cs and Ba 3d Photoemission". United States. doi:10.1103/PHYSREVLETT.98.143002.
@article{osti_20951208,
title = {Outstanding Spin-Orbit-Activated Interchannel Coupling in the Cs and Ba 3d Photoemission},
author = {Richter, T. and Heinecke, E. and Zimmermann, P. and Godehusen, K. and Yalcinkaya, M. and Cubaynes, D. and Meyer, M.},
abstractNote = {Partial 3d{sub 5/2} photoionization cross sections of atomic Cs and Ba as well as the asymmetry parameter {beta} of the angular distribution of the Cs 3d{sub 5/2} photoelectrons were investigated near the threshold of the 3d{sub 3/2} channel at about 750 eV and 800 eV, respectively. Strong electron correlations, in particular, the spin-orbit activated interchannel coupling between the 3d{sub 5/2} and 3d{sub 3/2} channels, govern the observed spectra. The most striking effect was found for {beta}{sub 5/2} of Cs with a dramatic increase from {beta}=1.0 to {beta}=1.5 in the energy region where the mixing between both channels causes a pronounced minimum in the partial 3d{sub 5/2} cross section. This result indicates the decisive influence of the interference term on the asymmetry parameter {beta} with its dependence on the phase difference between the outgoing p and f waves.},
doi = {10.1103/PHYSREVLETT.98.143002},
journal = {Physical Review Letters},
number = 14,
volume = 98,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2007},
month = {Fri Apr 06 00:00:00 EDT 2007}
}