CsTb2F7: an efficient radioluminescent material for fiberoptic radiation detection

P. MOLINA; J. MARCAZZÓ; N.M. KHAIDUKOV; M. SANTIAGO

RADIATION EFFECTS AND DEFECTS IN SOLIDS

TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2011 vol. 166 p. 35 - 39

1042-0150

In this article, the feasibility of using CsTb2F7crystals as scintillating detectors to build radioluminescent fiberoptic dosimetry (FOD) probes has been investigated for the first time. The radioluminescence (RL) efficiency of this compound has been found to be more than twice as high as that of commercialAl2O3:C detectors under excitation with gamma radiation from a60Co source.Additionally, the intensity of the RL signal shows no dependence on the accumulated dose. Both RL and photoluminescence spectra are nearly identical, showing emission bands at 490 and 550nm and a minor band at 600nm, which are compatible with the characteristic emission of Tb3+. In accordance with these results, stoichiometric terbium fluoride seems to be a promising material for use as an RL sensor for FOD in radiation medicine.