CATION AND ANION ELECTRONIC EXCITATIONS IN MgO ANDBaF2CRYSTALS UNDER EXCITATION BY PHOTONS UP TO 75eV

M. Kirm, S. Vielhauer, G. Zimmerer, A. Lushchik and Ch. Lushchik
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M. Kirm: II. Institut für Experimentalphysik der Universität Hamburg Luruper Chaussee 149, Hamburg 22 761, Germany
S. Vielhauer: II. Institut für Experimentalphysik der Universität Hamburg Luruper Chaussee 149, Hamburg 22 761, Germany
G. Zimmerer: II. Institut für Experimentalphysik der Universität Hamburg Luruper Chaussee 149, Hamburg 22 761, Germany
A. Lushchik: Institute of Physics, University of Tartu, Riia 142, Tartu 51 014, Estonia
Ch. Lushchik: Institute of Physics, University of Tartu, Riia 142, Tartu 51 014, Estonia

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 1363-1368

Abstract: The creation of primary and secondary cation excitations was investigated for MgO andBaF2crystals using the energy-and time-resolved luminescence method. It was shown that the primary cation excitations in MgO created by photons of 50–65 eV decay with the formation of anion free excitons and electron–hole pairs. The formation of secondary cation holes by hot photoelectrons in theBa2+5p shell causes the increase of cross-luminescence intensity whereas the creation of neither primary nor secondary cation excitons causes the appearance of cross-luminescence inBaF2.

Date: 2002
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DOI: 10.1142/S0218625X02003810

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