Spectral matching factors for LaBr3:Ce crystals coupled to Hamamatsu H8500 family PMTs

The matching between the spectral distribution of the scintillation light from a LaBr3:Ce crystal and the spectral distribution of the quantum efficiency of a Photomultiplier Tube (PMT) can be characterized by a matching factor whose value depicts, in the range from 0 to 1, the efficiency of PMT for the crystal. A systematic survey of literature was carried out identifying a set of 44 LaBr3:Ce emission spectra and 11 spectral quantum efficiencies of PMTs, all published in the years 2002–2010. Results showing the values of matching factors calculated for all the spectral combinations are presented and commented upon.