p-Terphenyl: An alternative to liquid scintillators for neutron detection

Sardet, Alix; Varignon, C.; Bouchet, L.; Granier, T.; Oberstedt, Andreas

doi:10.1016/j.nima.2015.04.038

Cited by 23 publications

(9 citation statements)

References 14 publications

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“…A sharp drop-off would be expected in an ideal detector, corresponding to the maximum energy that can be imparted to the recoil proton, given the incident neutron energy from the ToF. These preliminary results are consistent with Sardet et al [9], although the statistics are poor and it is likely that multiple neutrons entered the coincidence window given the proximity and high activity of the source (Figure 5). Future plans include more thorough calibration using the INCA spare.…”

Section: Pos(icrc2019)053supporting

confidence: 87%

“…At that transition point, the energy resolution degrades significantly due to this effect, and the increased influence of electronic noise. As outlined in Sardet et al [9], energy resolution data were fit using…”

Section: Performance Characteristicsmentioning

confidence: 99%

“…Neutron response function created by binning events based on ToF. Drop-off point for a given energy from[9] shown as vertical lines.…”

mentioning

confidence: 99%

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Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

Nolfo¹,

Mitchell²,

Bruno³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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The Ionospheric Neutron Content Analyzer (INCA) is a double scatter neutron spectrometer designed for a 3U CubeSat, currently set for an Educational Launch of Nanosatellites (ELaNa) launch in 2019. In a double scatter neutron spectrometer, a neutron scatters in two separate scintillators (D1, D2) spaced 15 cm apart, giving information on the incident neutron's direction and energy from the pulse height in D1 and time-of-flight between the scintillators. INCA employs silicon photomultiplier (SiPM) arrays coupled to p-terphenyl scintillators. A neutron scattering event in p-terphenyl results in a pulse shape with a longer tail, due to delayed fluorescence of the scintillator, than that of a gamma ray. This property, known as pulse shape discrimination, is utilized in INCA to distinguish detected neutrons from gamma rays. Charged particles are vetoed by plastic scintillator anticoincidence detectors completely surrounding the spectrometer. The instrument was calibrated using a 252 Cf neutron beam, and compared to Geant4 simulation results. Details of the INCA instrument and these calibrations are discussed.

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Section: Pos(icrc2019)053supporting

confidence: 87%

Section: Performance Characteristicsmentioning

confidence: 99%

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Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

Nolfo¹,

Mitchell²,

Bruno³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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“…For the planned commissioning experiment, the proposed array would consist of eight bars per layer, and five layers deep along the beam axis. Accounting for quenching [19] and the position threshold extracted in this article (300 keVee), we also estimate an efficiency between 20-35% for neutrons between 2-10 MeV. Both the prototype and full array will use PSD capable integrated circuits [20] which will be capable of handling the large channel load.…”

Section: Discussionmentioning

confidence: 94%

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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“…Our laboratory is involved, since 2000's, in PFNS measurements [4][5][6] but a special effort was done the last years to improve the accuracy and uncertainties [7,8]. New dedicated tools (fission chamber, electronics, data acquisition system) were developed and validated through new PFNS measurements.…”

Section: Introductionmentioning

confidence: 99%

New prompt fission neutron spectra measurements in the²³⁸U(n,f) reaction with a dedicated setup at LANSCE/WNR

Bouchet

Marini²,

Bélier³

et al. 2017

EPJ Web Conf.

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A new prompt fission neutron spectra (PFNS) measurement in the 238 U(n,f) reaction was performed at LANSCE/WNR facility. Evaluated data show discrepancies on the low (below 1 MeV) and high (above 5 MeV) energy parts in the PFNS for different major and minor actinides. The goal is to improve these measurements in a wide range of incident energy. The energy of the incoming neutron, inducing the fission, and the prompt neutron energies, are measured by time-of-flight method. A dedicated fission chamber was developed, in order to improve alpha-fission discrimination, timing resolution, actinide mass, and to reduce the amount of neutron scattering. To detect prompt neutrons, the 54 Chi-Nu scintillator cells array were surrounding the fission chamber. High statistics were recorded during this experiment, allowing a precise study of PFNS behavior as a function of incident neutron energy, from 1 MeV to 200 MeV. This experiment also showed that all the new tools developed to improve PFNS measurements are performing. Therefore, measurements of PFNS with others actinides such as 239 Pu are planned.

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p-Terphenyl: An alternative to liquid scintillators for neutron detection

Cited by 23 publications

References 14 publications

Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

A position and pulse shape discriminant p-terphenyl detector module

New prompt fission neutron spectra measurements in the²³⁸U(n,f) reaction with a dedicated setup at LANSCE/WNR

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p-Terphenyl: An alternative to liquid scintillators for neutron detection

Cited by 23 publications

References 14 publications

Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

Performance Characteristics of the Ionospheric Neutron Content Analyzer (INCA)

A position and pulse shape discriminant p-terphenyl detector module

New prompt fission neutron spectra measurements in the238U(n,f) reaction with a dedicated setup at LANSCE/WNR

Contact Info

Product

Resources

About

New prompt fission neutron spectra measurements in the²³⁸U(n,f) reaction with a dedicated setup at LANSCE/WNR