Energy transfer phenomena in Tb/sup 3 +/-activated gadolinium tantalate (GdTaO/sub 4/)

Journal Article · Fri Jun 01 04:00:00 EDT 1984 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(84)90033-3· OSTI ID:5087882

Lammers, M J.J.; Blasse, G

The energy transfer phenomena in GdTaO/sub 4/ activated with Tb/sup 3 +/ have been investigated. It is shown that the ratio of the /sup 5/D/sub 3/ and /sup 5/D/sub 4/ emission intensities of Tb/sup 3 +/ depends strongly on the excitation wavelength. The Tb/sup 3 +/ /sup 5/D/sub 3/ level is populated by direct excitation into the Tb/sup 3 +/ 4f/sup 8/ levels, by energy transfer from the Gd/sup 3 +/ /sup 6/P level or by energy transfer from the intrinsic tantalate group via the Gd/sup 3 +/ /sup 6/P level. The Tb/sup 3 +/ /sup 5/D/sub 4/ level is populated by direct excitation into the 4f/sup 7/5d state, by energy transfer from the Gd/sup 3 +/ /sup 6/I level, or by cross-relaxation from the /sup 5/D/sub 3/ level. Direct relaxation from /sup 5/D/sub 3/ to /sup 5/D/sub 4/ is found to be improbable. The /sup 6/I ..-->.. /sup 6/P relaxation of the excited Gd/sup 3 +/ ion is slow in comparison with the competing energy transfer processes.

• Research Organization: Physical Laboratory, State University, Utrecht
• OSTI ID: 5087882
• Journal Information: Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 19:6; ISSN MRBUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ACTIVATION ENERGY
ENERGY
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
GADOLINIUM COMPOUNDS
LUMINESCENCE
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RELAXATION
TANTALATES
TANTALUM COMPOUNDS
TERBIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WAVELENGTHS