SNM detection by means of thermal neutron interrogation and a liquid scintillation detector

Ocherashvili, A.; Roesgen, E.; Beck, A.; Caspi, E. N.; Mosconi, M.; Crochemore, J.-M.; Pedersen, B.

doi:10.1088/1748-0221/7/03/c03037

Cited by 7 publications

(1 citation statement)

References 10 publications

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“…In particle physics, neutrino and anti neutrino detection is pursued by using very large volumes of scintillating materials, as in the case of SNO+ 5 and BOREXINO 6 , very recently plastic scintillating tiles with embedded waveshifting fibers were also used to fabricate Shashlik calorimeters to detect muons and hadron showers 7 . Among the applications it is worth mentioning the prevention of terrorism by monitoring neutrons emission from traveling goods 8 , avoiding spillage of contaminated liquids by detecting fission signatures from fissile materials in shielded containers 9 , neutrons dosimetry in potentially hazardous environments such as nuclear plants 10 , whereas metal recycling industry strongly needs monitoring of radioactive materials in scrap feeds 11 .…”

Section: Introductionmentioning

confidence: 99%

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

Marchi

Pino

Fontana

et al. 2019

Sci Rep

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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.

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