A Composite Method for Improving the Pulse Shape Discrimination Efficiency of a Scintillation Detector Using EJ-301 Liquid

Thạc sĩNguyễn Duy LýPhan Van Chuan, Nguyen Xuan Hai, Nguyen Ngoc, Pham Dinh Khang, Nguyen Quang Hung, Truong Van Minh

Khoa Khoa Học Cơ Bản

Thể loại: Bài báo

Sơ lược nội dung

This article presents a composite (COM) method to obtain the high-resolution pulse shape discrimination (PSD) for the neutron and gamma-ray pulses generated from scintillation detectors. The method, which is based on a selective combination of the digital charge integration (DCI) with the reference pulse method, aims to reduce the mixed radiation events in the low-energy range. An EJ-301 liquid scintillation detector together with a fast sampling analog-to-digital converter (ADC) is used to measure and digitize the pulses induced from the radioactive decays of 60 Co and 252 Cf, which are then analyzed by our COM method. The proposed method is evaluated using the figure of merit (FoM) and separation quality function F(u), and the results are compared with three known methods, namely the DCI, standard event fit (SEF), and artificial neural network (ANN) methods. We show that the average values of FoM and F(u) obtained within the COM method are about ten times higher than those obtained within the DCI and SEF in the whole energy range from 50 to 1000 keV electron equivalent (keVee). In particular, by using the COM method, the percentage of gamma events being confused as neutrons ranges from 0.32% to 8.80% when the energy is reduced from 400 to 50 keVee. This finding, which is significantly lower than those obtained by using the DCI and SEF, indicates that the proposed COM method should be considered as a leading method for producing a neutron/gamma PSD counter system with high resolution.

Thông tin chung
Thể loại
Bài báo
Năm xuất bản
11 Thg3 2021
Ngôn ngữ gốc
Tiếng Anh
Tạp chí công bố
IEEE Transactions on Instrumentation and Measurement
Ấn phẩm số
Vol. 70
Loại tạp chí
Danh mục ISI
Chất lượng

Tài liệu tham khảo

Để đọc toàn văn của bài báo này, bạn có thể yêu cầu một bản sao đầy đủ trực tiếp từ các tác giả.