12-23 October 2020
GMT timezone

Optimization of PSD technique on charge integration ratio to improve neutron/gamma discrimination for EJ-276 plastic scintillation detector

13 Oct 2020, 16:14
1m
Mini Oral and Poster Front End Electronics and Fast Digitizers Poster session B-01

Speaker

Dr VO, Hong Hai (University of Science, VNUHCM )

Description

Charge integration ratio (Qratio), method in the Pulse Shape Discrimination (PSD) technique has been widely used to discriminate between fast neutron and gamma in organic scintillation detectors. Here Qratio is defined as the ratio of tail integration to total integration of digitized pulses. In this method, tail integration window is depends much on the decay components in fluorescence of organic scintillation material and PMT time response.
In this work, we carry out optimizing the tail integration window, based on decay components of organic scintillation material and PMT time response to improve the Figure of Merit (FOM), a quantity characterizing for neutron/gamma separation. We study for an EJ-276 plastic scintillator of (14x40x14)mm3, a commercial product of ELJEN technology, which is known for its good performance of separating gamma and fast neutron signals on the basis of their timing characteristics. PMT pulse shape recorded by a DRS-4 digitizer with sampling rate of 2 GSPS is employed. We conduct an experiment on Cf-252 radioisotope source which emits fast neutron and gamma. A comparison of charge integration ratio is carried out in energy thresholds from 100keVee to 1000keVee to evaluate the neutron/gamma discrimination.

Minioral Yes
IEEE Member Yes
Are you a student? No

Primary author

Dr VO, Hong Hai (University of Science, VNUHCM )

Co-authors

Prof. NOMACHI, Masaharu (University of Science) Mr PHAN, Thanh Xuan (University of Science, VNUHCM) Mr VU, Ngoc Tu (University of Science, VNUHCM)

Presentation materials