Application of Sm Oxide Doped Oxyfluoride Glasses for the Development of Extrinsic Fibre Optical X-Ray Sensors

The fabrication and optical properties of Sm oxide doped oxyfluoride glasses and their spectral response to X-ray radiation are presented. We report on the observation of a spectrally dependent, radiation induced attenuation of the radio and photo luminescence spectra which follow a power law with different fitting parameters. The spectral maxima in the visible attenuate differently during irradiation which permits the development of extrinsic sensors in which scintillation responses and fluorescence from laser excitation are observed separately using time multiplexing. Due to substantially different time scaling parameters lower doses can be measured using fluorescence while larger doses can be measured using the spectrally differentiated scintillation responses.