6LiF:ZnS(Ag) Neutron Detector Performance Optimized Using Waveform Recordings and ROC Curves
| Autor: | N.C. Maliszewskyj, A. Osovizky, E. Binkley, Charles F. Majkrzak, M. Jackson, C. Hurlbut, G.M. Baltic, J. Ziegler, N. Hadad, K. Pritchard, P. Tsai |
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| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Physics::Instrumentation and Detectors business.industry Astrophysics::High Energy Astrophysical Phenomena Detector Neutron radiation Article Particle detector Neutron capture Silicon photomultiplier Optics Nuclear Energy and Engineering Waveform Neutron detection Neutron Electrical and Electronic Engineering business |
| Zdroj: | IEEE Trans Nucl Sci |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/tns.2019.2953875 |
| Popis: | We used Gaussian separation and receiver operating characteristic (ROC) curves to optimize the neutron sensitivity and gamma rejection of an ultra-thin (6)LiF:ZnS(Ag)-scintillator-based neutron detector paired with a silicon photomultiplier (SiPM). We recorded the waveforms while operating the detector in a monochromatic cold neutron beam and in the presence of isotopic (137)Cs and (60)Co gamma sources. We used a two-window charge comparison (CC) pulse-shape discrimination (PSD) technique to distinguish the neutron capture events from other types of signals. By feeding the recorded waveforms through variants of this algorithm, it was possible to optimize the duration of the integration windows [(0–100 ns) for the prompt window and (100–2300 ns)] for the delayed window. We then computed the detector’s ROC curve from waveform recordings and compared that with the experimental performance. We also used this procedure to compare a series of detector configurations to select the optimal bias voltage for the SiPM photosensor. |
| Databáze: | OpenAIRE |
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