Optical properties and pulse shape discrimination in siloxane-based scintillation detectors.

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ID: 97181
2019
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Abstract
The possibility to detect fast neutrons as a distinct signal from that one of γ-rays background is surely of great importance for several topics, spanning from homeland security to radiation monitoring in nuclear physics research plants. Nowadays, Helium-3 based detectors are extremely expensive, while the use of large volume liquid scintillators presents serious concerns related to spillage risks and waste disposal. A very attractive alternative is the use of commercially available solid scintillators, which exploits an aromatic polymer matrix entrapping very high loadings of primary dye, thereby enabling the use of pulse shape analysis (PSA) to discriminate between fast neutrons and γ-rays. In this work, we analyse in detail the optical features of a solid scintillator composed by polymethylphenylsiloxane (PMPS) as base polymer loaded with moderate amounts of 2,5-diphenyloxazole (PPO). Furthermore, fluorescence decay kinetics have been correlated to the observed pulse shape discrimination capabilities of this radiation and thermally resistant scintillator, whose performances have been discussed in terms of conformational features and excimers formation revealed by the optical analyses.
Reference Key
marchi2019opticalscientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Marchi, T;Pino, F;Fontana, C L;Quaranta, A;Zanazzi, E;Vesco, M;Cinausero, M;Daldosso, N;Paterlini, V;Gramegna, F;Moretto, S;Collazuol, G;Degerlier, M;Fabris, D;Carturan, S M;
Journal Scientific reports
Year 2019
DOI
10.1038/s41598-019-45307-8
URL
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