Two scintillators, a Li-6 loaded ZnS(Ag) inorganic scintillator and a natural boron loaded (10 % concentration by weight) plastic scintillator, were evaluated for dose measurements in accelerator- based boron neutron capture therapy (ABNCT) using various monoenergetic neutrons generated via the Li-7(p,n)Be-7 reaction. Protons to initiate the reaction were obtained from the Van de Graaff accelerator at the University of Massachusetts Lowell. While the inorganic scintillator has pronounced response to thermal neutrons, the boron loaded plastic scintillator is quite sufficient for detecting signals due to both fast and thermal neutrons, as well as gamma rays. The plastic scintillator can be used in mixed beam dosimetry for fast neutrons, thermal neutrons, and photons using pulse height analysis. Its fast response is suitable for making real time dose measurements as well.

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