Efficient crystal radiation detectors based on Tb3-doped fluorides for radioluminescence dosimetry

J. MARCAZZÓ; J. HENNIGER; N.M. KHAIDUKOV; V.N. MAKHOV; E. CASELLI; M. SANTIAGO

JOURNAL OF PHYSICS - D (APPLIED PHYSICS)

Institute of Physics and IOP Publishing Ltd.

Lugar: Bristol; Año: 2007 vol. 40 p. 5055 - 5060

0022-3727

The luminescence properties of Tb3+-doped fluoride crystals under excitation with ionizing irradiation have been studied in order to assess the feasibility of using them as crystal detectors for in vivo radiotherapy dosimetry. In particular, it has been found that the radioluminescence intensity from both CsY2F7 and CsGd2F7 doped with 15 at % Tb3+ is almost six times that from the commercial Al2O3:C detector. The spectral composition of emitted light has been analysed in order to determine the function of the Tb3+ activator ion during ionizing radiation-induced luminescence. The thermally stimulated luminescence of the crystals has also been investigated.