Low energy light yield of fast plastic scintillators

Laplace, T. A.; Goldblum, B. L.; Brown, J. A.; Bleuel, D. L.; Brand, C. A.; Gabella, G.; Jordan, Tyler; Moore, C. Bradley; Munshi, N. A.; Sweger, Z. W.; Sweet, A.; Brubaker, E.

doi:10.1016/j.nima.2018.10.122

Cited by 29 publications

(28 citation statements)

References 19 publications

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“…The dTOF technique used in this work enables a direct measurement of the relative PLY compared to the method used by Pozzi et al, which infers the proton energy from neutron efficiency curves without fully accounting for systematic uncertainties. The black triangles show a dTOF measurement by Laplace et al of the PLY of EJ-204, a fast plastic organic scintillator from Eljen Technology that also employs a PVT solvent [18]. The EJ-230 result obtained in this work is consistent with the PLY of the EJ-204 scintillator within the estimated uncertainties.…”

Section: Resultssupporting

confidence: 77%

Proton Light Yield of Fast Plastic Scintillators for Neutron Imaging

Manfredi

Goldblum

Laplace

et al. 2020

IEEE Trans. Nucl. Sci.

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Plastic organic scintillators have been tailored in composition to achieve ultra-fast temporal response, thereby enabling the design and development of fast neutron detection systems with high timing resolution. Eljen Technology's plastic organic scintillators-EJ-230, EJ-232, and EJ-232Qare prospective candidates for use in emerging neutron imaging systems, where fast timing is paramount. To support the neutron response characterization of these materials, the relative proton light yields of EJ-230, EJ-232, and EJ-232Q were measured at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. Using a broad-spectrum neutron source and a double time-offlight technique, the proton light yield relations were obtained over a proton recoil energy range of approximately 300 keV to 4 MeV. The EJ-230, EJ-232, and EJ-232Q scintillators exhibited similar proton light yield relations to each other as well as to other plastic scintillators with the same polymer base material. A comparison of the relative proton light yield of different sized cylindrical EJ-232 and EJ-232Q scintillators also revealed consistent results. This work provides key input data for the realistic computational modeling of neutron detection technologies employing these materials, thereby supporting new capabilities in near-field radionuclide detection for national security applications.

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Section: Resultssupporting

confidence: 77%

Proton Light Yield of Fast Plastic Scintillators for Neutron Imaging

Manfredi

Goldblum

Laplace

et al. 2020

IEEE Trans. Nucl. Sci.

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“…The target scintillator volumes and treatment are described in section 3. The EJ-309 target scintillator was coupled on one base to a Hamamatsu Photonics H1949-50 PMT, whereas the EJ-276 and organic glass target scintillators were coupled on both bases to Hamamatsu H1949-51 PMTs in a similar dual-window configuration as described in [35]. For each experiment, the observation detectors (shown at forward angles with respect to the target scintillator in figure 3) were composed of 5.08 cm dia.…”

Section: Experimental Methodsmentioning

confidence: 99%

Comparative scintillation performance of EJ-309, EJ-276, and a novel organic glass

et al. 2020

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A : An organic glass scintillator developed by Sandia National Laboratories was characterized in terms of its light output and pulse shape discrimination (PSD) properties and compared to commercial liquid (EJ-309) and plastic (EJ-276) organic scintillators. The electron light output was determined through relative comparison of the 137 Cs Compton edge location. The proton light yield was measured using a double time-of-flight technique at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. Using a tunable broad-spectrum neutron source and an array of pulse-shape-discriminating observation scintillators, a continuous measurement of the proton light yield was performed for EJ-309 (200 keV−3.2 MeV), EJ-276 (170 keV−4.9 MeV), and the organic glass (50 keV−20 MeV). Finally, the PSD properties of the organic glass, EJ-309, and EJ-276 were evaluated using an AmBe source and compared via a figure-of-merit metric. The organic glass exhibited a higher electron light output than both EJ-309 and EJ-276. Its proton light yield and PSD performance were comparable to EJ-309 and superior to that of EJ-276. With these performance characteristics, the organic glass scintillator is well poised to replace current state-of-the-art PSD-capable scintillators in a range of fast neutron detection applications.

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“…For the purpose of assessing the consistency of this paper's results, the scaling ∼ 10 4 adc per 1 MeVee provides a crude approximation of the energy calibration. This scaling places our trigger threshold at ∼ 1 MeVee (10 4 adc), or ∼ 3.5 MeV in proton recoil energy [18,19]. As an illustration, Fig.…”

Section: Data Processingmentioning

confidence: 89%

Monitoring the SNS basement neutron background with the MARS detector

Akimov,

An,

Awe

et al. 2021

Preprint

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We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) background for the COHERENT collaboration. MARS was positioned next to the COH-CsI coherent elastic neutrinonucleus scattering detector in the SNS basement corridor. This is the basement location of closest proximity to the SNS target and thus, of highest neutrino flux, but it is also well shielded from the BRN flux by infill concrete and gravel. These data show the detector registered roughly one BRN per day. Using MARS' measured detection efficiency, the incoming BRN flux is estimated to be 1.20 ± 0.56 neutrons/m 2 /MWh for neutron energies above ∼ 3.5 MeV and up to a few tens of MeV. We compare our results with previous BRN measurements in the SNS basement corridor reported by other neutron detectors.

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Low energy light yield of fast plastic scintillators

Cited by 29 publications

References 19 publications

Proton Light Yield of Fast Plastic Scintillators for Neutron Imaging

Proton Light Yield of Fast Plastic Scintillators for Neutron Imaging

Comparative scintillation performance of EJ-309, EJ-276, and a novel organic glass

Monitoring the SNS basement neutron background with the MARS detector

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