Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
81 (1997), S. 924-930
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A fluorescence line narrowing technique was carried out for sodium borate glasses containing a Sm2+ ion and its isoelectonic Eu3+ ion under a pulsed tunable dye laser excitation. In order to obtain site-dependent information, measurements were made by exciting the inhomogeneously broadened 5D0-7F0 transition at 10 K. Line-narrowing fluorescence of the 5D0→7F1 transition and the temporal changes of the emission lines were investigated as a function of excitation energy, and the dynamics of excited states for both ions were compared with each other. The results indicate that the site-to-site variations of the inhomogeneous broadening of 5D0–7F0 transitions are attributed to the apparent difference in local environment between the Sm2+ and Eu3+ ions doped in borate glasses with Na2O content from 10 to 20 mol %. Also, a decrease in concentration of rare-earth ions causes a more significant effect on Eu3+ ions than on Sm2+ ions in the high-excitation-energy range. It is concluded that the difference in the local environment between Sm2+ and Eu3+ is mainly ascribable to the difference in the valence and in the ionic radius. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.364223
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