PHOTOELECTRON-SPECTROSCOPIC STUDY OF CORE-EXCITON DECAY IN AUGER-FREE LUMINESCENCE MATERIALBaF2

Masao Kamada and Minoru Itoh
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Masao Kamada: UVSOR Facility, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
Minoru Itoh: Department of Electrical and Electronic Engineering, Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 01, 325-329

Abstract: The nonradiative decay processes of theBa-5pcore exciton inBaF2have been investigated by using photoelectron spectroscopy, since the exciton peak is missing in the excitation spectrum of the Auger-free luminescence. The decay probability of the direct recombination process estimated from the constant-initial state spectrum and the absorption coefficient was found to be smaller than unity, indicating the existence of the other decay processes. It is suggested that theBa-5pcore exciton is relaxed by about 0.9 eV.

Date: 2002
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DOI: 10.1142/S0218625X02002324

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