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This paper reports on a study of the luminescence characteristics of KBe2BO3F2 (KBBF) and RbBe2BO3F2(RBBF) crystals in UV/visible spectral range. The KBBF crystals are very popular for their nonlinear optical properties, however they have a potential to be used as scintillators for neutron detection. To determine the effectiveness of KBBF scintillation we combine the results from measurements of optical absorption; radioluminescence; light yield; photoluminescence and decay kinetics in the temperature range 8-330 K. Temperature dependence of luminescence in KBBF crystals is discussed.

It is the aim of this contribution to provide an overview of luminescence spectra and decay characteristics of Nd3+, Er3+ and Tm3+ centers in LiLuF4 single crystal including possible energy transfer mechanisms towards and away from the Nd3+ 5d excited state. Single crystal doped with the mentioned RE ions were prepared by micro-pulling-down technique. Excitation and emission spectra and fast decay kinetics in VUV spectral region are completed with radio-and photoluminescence spectra and decay kinetics in UV-visible region.