A Cs2LiYCl6:Ce-based advanced radiation monitoring device

Budden, Brent; Stonehill, L. C.; Dallmann, Nicholas; Baginski, M.J.; Best, D.J.; Smith, M. B.; Graham, S. A.; Dathy, C.; Frank, J. M.; McClish, M.

doi:10.1016/j.nima.2014.11.051

Cited by 29 publications

(21 citation statements)

References 12 publications

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“…The PMT was biased to −1400 V. We used an Agilent Acqiris DC282 10-bit waveform digitizer sampling at 2 GS/s to acquire 80,000 waveforms. Energy spectra and charge integrations were obtained with the LANL-developed Compact Laboratory PSD System (CLPS), which is based on the PSD8C ASIC [10] that was used in two handheld instruments utilizing elpasolites [11,12]. The CLPS system was designed to be flexible for use with a wide range of elpasolites, allowing the user to input pulse integration window widths, delays, and gains.…”

Section: Experimental Methodsmentioning

confidence: 99%

Pulse-shape discrimination and energy quenching of alpha particles in Cs2LiLaBr6:Ce3+

Mesick

Coupland

Stonehill

2017

Nuclear Instruments and Methods in Physics Research Section A:

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Cs 2 LiLaBr 6 :Ce 3+ (CLLB) is an elpasolite scintillator that offers excellent linearity and gamma-ray energy resolution and sensitivity to thermal neutrons with the ability to perform pulse-shape discrimination (PSD) to distinguish gammas and neutrons. Our investigation of CLLB has indicated the presence of intrinsic radioactive alpha background that we have determined to be from actinium contamination of the lanthanum component. We measured the pulse shapes for gamma, thermal neutron, and alpha events and determined that PSD can be performed to separate the alpha background with a moderate figure of merit of 0.98. We also measured the electron-equivalent-energy of the alpha particles in CLLB and simulated the intrinsic alpha background from 227 Ac to determine the quenching factor of the alphas. A linear quenching relationship L α = E α × q + L 0 was found at alpha particle energies above 5 MeV, with a quenching factor q = 0.71 MeVee/MeV and an offset L 0 = −1.19 MeVee.

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Section: Experimental Methodsmentioning

confidence: 99%

Pulse-shape discrimination and energy quenching of alpha particles in Cs2LiLaBr6:Ce3+

Mesick

Coupland

Stonehill

2017

Nuclear Instruments and Methods in Physics Research Section A:

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“…This region indicates the presence of thermal neutrons due to the slower decay constants of these waveforms. The Q-value of 6 Li capture reaction is 4.78 MeV; due to moderate quenching of the scintillation from heavy charged particles [15], the thermal neutron peak shows up at a GEE of 3.2 MeV [8]. A selection on this region of interest (by applying thresholds on both PSD ratio and energy) selects these events.…”

Section: Introductionmentioning

confidence: 99%

Handheld readout electronics to fully exploit the particle discrimination capabilities of elpasolite scintillators

Budden¹,

Stonehill²,

Warniment³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tA new class of elpasolite scintillators has garnered recent attention due to the ability to perform as simultaneous gamma spectrometers and thermal neutron detectors. Such a dual-mode capability is made possible by pulse-shape discrimination (PSD), whereby the emission waveform profiles of gamma and neutron events are fundamentally unique. To take full advantage of these materials, we have developed the Compact Advanced Readout Electronics for Elpasolites (CAREE). This handheld instrument employs a multi-channel PSD-capable ASIC, custom micro-processor board, front-end electronics, power supplies, and a 2 in. photomultiplier tube for readout of the scintillator. The unit is highly configurable to allow for performance optimization amongst a wide sample of elpasolites which provide PSD in fundamentally different ways. We herein provide an introduction to elpasolites, then describe the motivation for the work, mechanical and electronic design, and preliminary performance results.

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“…The processing electronics have been used in previous elpasolite-based instruments built at LANL [14], [15] and are built around the PSD8C ASIC [16]. These ASICs support eight channels with three gated integrators (prompt and delayed PSD windows, energy) for each channel, enabling a compact electronics board to easily handle the multi-channel EPICS sensor.…”

Section: Epics Designmentioning

confidence: 99%

Elpasolite Planetary Ice and Composition Spectrometer (EPICS): A Low-Resource Combined Gamma-Ray and Neutron Spectrometer for Planetary Science

Mesick

Stonehill

Coupland

et al. 2018

2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC)

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Neutron and gamma-ray spectroscopy (NGRS) is a well established technique for studying the geochemical composition and volatile abundance relevant to planetary structure and evolution of planetary bodies. Previous NGRS instruments have used separate gamma-ray and neutron spectrometers. The Elpasolite Planetary Ice and Composition Spectrometer (EPICS) instrument is an innovative and fully integrated NGRS with low resource requirements. EPICS utilizes elpasolite scintillator read out by silicon photomultipliers to combine the gamma-ray and neutron spectrometer into a single instrument, leading to a significant reduction in instrument size, weight, and power. An overview and motivation for the EPICS instrument, current status of the EPICS development, and a discussion of the expected sensitivity and performance are presented.

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A Cs2LiYCl6:Ce-based advanced radiation monitoring device

Cited by 29 publications

References 12 publications

Pulse-shape discrimination and energy quenching of alpha particles in Cs2LiLaBr6:Ce3+

Pulse-shape discrimination and energy quenching of alpha particles in Cs2LiLaBr6:Ce3+

Handheld readout electronics to fully exploit the particle discrimination capabilities of elpasolite scintillators

Elpasolite Planetary Ice and Composition Spectrometer (EPICS): A Low-Resource Combined Gamma-Ray and Neutron Spectrometer for Planetary Science

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