MC study of size effects and angular response of fiberoptic scintillator detectors for radiation therapy

YOHANNA FERNÁNDEZ; JOSE MASSA; MARTIN SANTIAGO; JULIÁN MARCAZZÓ; NAHUEL MARTÍNEZ; PABLO MOLINA

Córdoba

Congreso; 14th International Symposium on Radiation Physics; 2018

We have simulated by Monte Carlo (MC) the angular response of different fiberoptic dosimetry (FOD) probes made of YVO 4 :Eu scintillator. Cylindrical-and spherical shaped detectors have been studied. Comparison of the simulations with experimental measurements suggests that symmetry of the detector is critical to achieve isotropic response of a FOD probe. Besides, it seems that the optical fiber only collects the scintillation light from the closest 0.5mm-thick layer of scintillator.