Optical and scintillating properties of Ce:Li(Y,Lu)F4 single crystals

We have investigated the optical and scintillating properties of Lu co-doped Ce:LiYF4 single crystals with various Lu content. In the transmittance and absorption spectra, the absorption peaks at 243 nm get systematically red shifted in contrast to the peaks at 197 and 200 nm which get blue shifted with the increase in Lu content. At the same time, emission peaks at 306 nm and 200 nm under 295 nm excitation also get red shifted. The decay time of Ce:Li(Y,Lu)F4 crystals under 295 nm excitation is found to be faster than that of Ce:LiYF4 and Ce:LiLuF4 crystals. The alpha-peak positions in the pulse-height spectra and decay times of crystals under alpha-ray irradiation are found to vary with the Lu content.