2017/08/20 by Balaram Dey, Dey, Balaram, C Ghosh +11
Physics and Astronomy · Engineering · #Nuclear Physics and Applications #Nuclear reactor physics and engineering #Radiation Detection and Scintillator Technologies
paper · pdf · doi:10.48550/arxiv.1708.06346
We have studied neutron response of PARIS phoswich [LaBr3(Ce)-NaI(Tl)] detector which is being developed for measuring the high energy (Eγ = 5 - 30 MeV) γ rays emitted from the decay of highly collective states in atomic nuclei. The relative neutron detection efficiency of LaBr3(Ce) and NaI(Tl) crystal of the phoswich detector has been measured using the time-of-flight (TOF) and pulse shape discrimination (PSD) technique in the energy range of En = 1 - 9 MeV and compared with the GEANT4 based simulations. It has been found that for En > 3 MeV, ∼ 95 % of neutrons have the primary interaction in the LaBr3(Ce) crystal, indicating that a clear n-γ separation can be achieved even at ∼15 cm flight path.