A position and pulse shape discriminant p-terphenyl detector module

• DOI: 10.1016/j.nima.2021.165492
• Publication Date: 2021-06-15T22:15:47Z
• Authors: D.P. Scriven; G. Christian; G.V. Rogachev; C.E. Parker; L.G. Sobotka; S. Ahn; G. Chubarian; S. Ota; E. Aboud; J. Bishop; E. Koshchiy; A.G. Thomas
• Keywords: 03 medical and health sciences; Physics - Instrumentation and Detectors; 0302 clinical medicine; FOS: Physical sciences; Instrumentation and Detectors (physics.ins-det); Nuclear Experiment (nucl-ex); Nuclear Experiment

We present the development of a neutron detector array module made with $\textit{para}$-terphenyl, a bright, fast, n/$��$ discriminating crystalline organic scintillator. The module is comprised of 2 cm $\times$ 2 cm $\times$ 2 cm $\textit{p}$-terphenyl crystals that have been optically coupled together to create a $\textit{pseudo-bar}$ module. While only relying on two photo detectors, the module is capable of distinguishing interactions between up to eight crystals. Furthermore, the module retains the $\textit{p}$-terphenyl's pulse shape discrimination (PSD) capability. Together this makes the pseudo-bar module a promising position-sensitive neutron detector. Here we present characteristics of the pseudo-bar module - its timing resolution as well as its pulse shape and position discrimination capabilities, and briefly discuss future plans for utilizing an array of pseudo-bar modules in a useful neutron detector system.<br/>13 pages, 12 figures, published in Nuclear Instruments and Methods in Physics Research Section A<br/>