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Characteristics of hybrid plastic scintillators for slow neutron measurements

By: Kim, H.C.; Hong, B.; Ahn, S.H.; Hu, R.J.; Kim, C.; Park, S.K.; Lee, S.J.; Kim, Y.J.; Hong, S.J.; Sim, K.S.; Lee, K.S.;

2007 / IEEE / 978-1-4244-0922-8

Description

This item was taken from the IEEE Conference ' Characteristics of hybrid plastic scintillators for slow neutron measurements ' In this paper, we report the characteristics and the performance of the hybrid plastic scintillators for slow neutron measurements. The 10B-doped and Gd-layered scintillators were manufactured and tested for slow and fast neutrons, and gamma rays. The slow neutrons were provided by an energy moderation of the fast neutrons emitted from a 0.5 Ci 252Cf source. The energy of the slow neutrons ranged from 10 to 600 meV with a peak at 75 meV. Neutron response functions for the hybrid plastic scintillators were measured with the calibrated slow neutron flux. Furthermore, the pulse-shape analysis was performed to differentiate the slow neutrons from the gamma rays. For the 10B-doped scintillators, the difference lying in the tail-to-total charge ratio distribution of the pulses was conductive to estimate the fraction of the gamma rays in the neutron data. However, for the Gd-layered scintillators, the difference was insignificant.