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VUV spectroscopy of pure and Sm 2+ doped SrFCl crystals
Author(s) -
Kisand Vambola,
Kink Rein,
Kink Ilmar,
Jaaniso Raivo,
Martinson Indrek
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301811
Subject(s) - excitation , doping , exciton , atomic physics , spectroscopy , emission spectrum , vacuum ultraviolet , materials science , analytical chemistry (journal) , spectral line , chemistry , physics , condensed matter physics , optoelectronics , quantum mechanics , astronomy , chromatography
The creation and relaxation of electronic excitations in pure crystalline SrFCl and Sm 2+ doped SrFCl were investigated using vacuum ultraviolet (VUV) spectroscopic methods. In the emission spectra of pure SrFCl and SrFCl : Sm 2+ a strong emission band in the vicinity of 4.7 eV was detected, connected to self‐trapped exciton (STE) having a Cl 2 − core. The threshold for creation of STE was detected at 8.5 eV in the excitation spectrum of pure SrFCl and at 7.6 eV for Sm 2+ doped SrFCl. It was demonstrated that the excitation spectrum of Sm 2+ emission is determined with direct excitation of a Sm 2+ center below 7.6 eV and with excitation of the SrFCl host above 7.6 eV.