Growth and Luminescence of M-Type ${\rm GdTaO}_{4}$ and Tb: ${\rm GdTaO}_{4}$ Scintillation Single Crystals

M-type GdTaO
₄
and Tb:GdTaO
₄
bulk single crystals were first grown by Czochralski method. Transmission, excitation, emission spectra and luminescence decay curves of them were measured. The refractive indices of GdTaO
₄
were calculated with its transmission spectrum and fitted with Sellmeier equation. GdTaO
₄
shows Gd
³⁺
absorption and defect luminescence, Tb
³⁺
exhibits its typical absorption and luminescence in GdTaO
₄
. The luminescence decay times of GdTaO
₄
and Tb:GdTaO
₄
were also determined by fitting luminescence decay curves with single-exponential function.