PHOTOELECTRON-SPECTROSCOPIC STUDY OF CORE-EXCITON DECAY IN AUGER-FREE LUMINESCENCE MATERIAL BaF2

Author:

KAMADA MASAO1,ITOH MINORU2

Affiliation:

1. UVSOR Facility, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan

2. Department of Electrical and Electronic Engineering, Faculty of Engineering, Shinshu University, Nagano 380-8553, Japan

Abstract

The nonradiative decay processes of the Ba -5p core exciton in BaF 2 have 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 the Ba -5p core exciton is relaxed by about 0.9 eV.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

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