“…The fast response of LaBr 3 (Ce) is crucial in handling the high count rate (several hundred thousand counts per second) encountered in typical applications in radiation protection. Moreover, LaBr 3 (Ce) has a good temperature stability (see section 3.3) and -among scintillating crystals -it offers an excellent intrinsic energy resolution, slightly above 3% FWHM at 662 keV [7], which is interesting -2 - in view of the final application of the commercial instrument as a hand-held gamma spectrometer. The size of the scintillating crystal was dictated by the required sensitivity range.…”