Optical spectroscopy of Ce3+ ions in BaY2F 8 single crystals

Year: 2002

Authors: Francini R., Pinelli S., Baraldi A., Capelletti R., Sani E., Toncelli A., Tonelli M.

Autors Affiliation: Dipartimento di Fisica, Istituto Nazionale di Fisica della Materia, Università di Roma Tor Vergata, Via delle Ricerca Scientifica 1, 00133 Roma, Italy; Dipartimento di Fisica, Istituto Nazionale di Fisica della Materia, Università di Parma, Parco Area delle Scienze 7/a, 43100 Parma, Italy; Dipartimento di Fisica, NEST-Istituto Nazionale di Fisica della Materia, Università di Pisa, Via F. Buonarroti 2, 56127 Pisa, Italy

Abstract: In the present work we report on the spectroscopic properties of the Ce3+ ion in BaY2F8 single crystals. The absorption and excitation spectra of the emission centered at 340 nm have been measured in the temperature range 15-300 K. The 340 nm emission consists of two broad partially overlapping bands, peaking at 324 and 347 nm (at 15K), respectively. The full width at half maximum is about 0.5 eV at room temperature. The absorption spectrum of the lowest in energy component of the fd transition of Ce3+ reveals at low temperature a marked vibronic structure. High resolution (0.02cm-1) Fourier transform infrared spectroscopy in the wave number range 500-5000 cm-1 and in the temperature range 9-300 K has been exploited to monitor the f level splitting. The absorption transitions from the three Stark components of the 2F5/2 manifold to the four of the 2F 7/2 one, have been monitored in the wave number range 2000-3400 cm-1. The wave number separation at 9 K between the lowest level of the ground 2F5/2 manifold and lowest one of the 2F7/2 manifold is found to be 2197.47cm-1 in good agreement with the splitting detected between the two components of the df emission.


Volume: 157 (6-12)      Pages from: 1009  to: 1013

KeyWords: Absorption; Electric excitation; Fourier transform infrared spectroscopy; Molecular structure; Spectroscopic analysis, BaY2F8; Ce3+; Optical spectroscopy; Vibronic structures, Single crystals
DOI: 10.1080/10420150215772

Citations: 1
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