Measurements of fast neutron scattering in plastic scintillator with energies from 20 to 200 MeV

Rogers, W.F.; Kuchera, A. N.; Boone, John M.; Frank, N.; Mosby, S.; Thoennessen, M.; Wantz, A.

doi:10.1016/j.nima.2019.162436

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…One can argue that among the concurring neutron scattering interactions in plastic scintillators the 12 C(n, n ) reaction is the most prominent. Neutron elastic scattering from C nuclei (and some inelastic scattering channels as well) produces light below typical detection threshold, anyhow, these kinds of events can occur with high rates in the active volume: for instance, a 90-MeV neutron in the detector volume is three times more likely to elastically scatter from C compared to scattering from H [20]. As already mentioned, neutron-particle scattering (as well as γ-rays signals) will be disentangled by dE/dx track analysis.…”

Section: A First Prototypementioning

confidence: 99%

RIPTIDE: a novel recoil-proton track imaging detector for fast neutrons

et al. 2021

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Neutron detectors are an essential tool for the development of many research fields, as nuclear, particle and astroparticle physics as well as radiotherapy and radiation safety. Since neutrons cannot directly ionize, their detection is only possible via nuclear reactions. Consequently, neutron-based experimental techniques are related to the detection of charged particle or electromagnetic radiation originating from neutron-induced reactions. The study of fast neutrons is often based on the neutron-proton elastic scattering reaction. In this case, the ionization induced by the recoil protons in a hydrogenous material constitutes the basic information for the design and development of neutron detectors. Although experimental techniques have continuously improved and refined, so far, proton-recoil track imaging is still weak in laboratory rate environments because of the extremely small detection efficiency. To address this deficiency, we propose a novel recoil-proton track imaging system in which the light deriving from a fast scintillation signal is used to perform a complete reconstruction in space and time of the event. In particular, we report the idea of RIPTIDE (RecoIl Proton Track Imaging DEtector): an innovative system which combines a plastic scintillator coupled to imaging devices, based on CMOS technology, or micro channel plate sensors. The proposed apparatus aims at providing neutron spectrometry capability by stereoscopically imaging the recoil-protons tracks, correlating the spatial information with the time information. RIPTIDE intrinsically enable the online analysis of the ionization track, thus retrieving the neutron direction and energy, without spoiling the overall efficiency of the detection system. Finally, the spatial and topological event reconstruction enables particle discrimination — a crucial requirement for neutron detection — by deducing the specific energy loss along the track.

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Section: A First Prototypementioning

confidence: 99%

RIPTIDE: a novel recoil-proton track imaging detector for fast neutrons

et al. 2021

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“…For simplicity, no spaces are left for photo readout, electronics, or support structure. Mono-energetic neutrons were fired from a point-source with a flight path of 1 m. The Geant4 default n-p and n-12 C cross sections have been replaced using the MENATE R code for cross section generation [15,16,17]. The MENATE R code more accurately reproduces neutron scattering and reaction cross sections for neutrons with Tn of 1 − 300 MeV.…”

Section: Simulationmentioning

confidence: 99%

A position and pulse shape discriminant p-terphenyl detector module

Scriven

Christian

Rogachev

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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We present the development of a neutron detector array module made with para-terphenyl, a bright, fast, n/γ discriminating crystalline organic scintillator. The module is comprised of 2 cm × 2 cm × 2 cm pterphenyl crystals that have been optically coupled together to create a 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 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.

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