MECHANISMS OF RED-BLUE CONVERSION IN CAF2 -ER3-ER3+,NA+( AND CDF2)

Authors
JOUART JP BOUFFARD M ZHANG X MARY G
Citation
Jp. Jouart et al., MECHANISMS OF RED-BLUE CONVERSION IN CAF2 -ER3-ER3+,NA+( AND CDF2), Annales de physique, 20(2), 1995, pp. 119-120
Citations number
1
Categorie Soggetti
Physics
Journal title
Annales de physique → ACNP
ISSN journal
00034169
Volume
20
Issue
2
Year of publication
1995
Supplement
S
Pages
119 - 120
Database
ISI
SICI code
0003-4169(1995)20:2<119:MORCIC>2.0.ZU;2-S
Abstract
The excitation spectra of the blue fluorescence of (Er3+,Na+) centre i n CdF2:Er3+, Na+ and (Er3+,F-i(-)) centre in CaF2:Er3+ were recorded, at 77K, between 15350 and 15850 cm(-1). In this spectral range, two ex cited state transitions I-4(13/2) --> F-4(5/2) and S-4(3/2) --> (4)G(7 /2) were identified. The mechanism responsible for the blue fluorescen ce of (Er3+,Na+) centre is a three-step absorption process via the lon g-lived metastable levels I-4(13/2) and S-4(3/2).