Metal-loaded organic scintillators for neutrino physics

Buck, C.; Yeh, M.

doi:10.1088/0954-3899/43/9/093001

Cited by 44 publications

(47 citation statements)

References 115 publications

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“…The WbLS "cocktail" can range from a high-LS fraction, oil-like mixture, with > 90% LS, to a water-like mixture with anything from 10% to sub-percent levels of LS. The choice of fluor affects the scintillation yield, timing, and emission spectrum, and metallic isotopes can be deployed to provide additional targets for neutrino interaction [20].…”

Section: Low-threshold Directional Detectionmentioning

confidence: 99%

Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

Bonventre

Gann

2018

Eur. Phys. J. C

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A first measurement of neutrinos from the CNO fusion cycle in the Sun would allow a resolution to the current solar metallicity problem. Detection of these low-energy neutrinos requires a low-threshold detector, while discrimination from radioactive backgrounds in the region of interest is significantly enhanced via directional sensitivity. This combination can be achieved in a water-based liquid scintillator target, which offers enhanced energy resolution beyond a standard water Cherenkov detector. We study the sensitivity of such a detector to CNO neutrinos under various detector and background scenarios, and draw conclusions about the requirements for such a detector to successfully measure the CNO neutrino flux. A detector designed to measure CNO neutrinos could also achieve a few-percent measurement of pep neutrinos.

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Section: Low-threshold Directional Detectionmentioning

confidence: 99%

Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

Bonventre

Gann

2018

Eur. Phys. J. C

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“…The ratio of Cherenkov to scintillation light would also offer a powerful handle for particle and event classification, while a clean identification of the Cherenkov cone would be ideal for long-baseline neua e-mail: jcaravaca@berkeley.edu (corresponding author) trino physics. A detector with these capabilities would have favorable signal to background ratio across a broad spectrum of physics topics [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Characterization of water-based liquid scintillator for Cherenkov and scintillation separation

et al. 2020

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This paper presents measurements of the scintillation light yield and time profile for a number of concentrations of water-based liquid scintillator, formulated from linear alkylbenzene (LAB) and 2,5-diphenyloxazole (PPO). We find that the scintillation light yield is linear with the concentration of liquid scintillator in water between 1 and 10% with a slope of $$127.9\pm 17.0$$ 127.9 ± 17.0 ph/MeV/concentration and an intercept value of $$108.3\pm 51.0$$ 108.3 ± 51.0 ph/MeV, the latter being illustrative of non-linearities with concentration at values less than 1%. This is larger than expected from a simple extrapolation of the pure liquid scintillator light yield. The measured time profiles are consistently faster than that of pure liquid scintillator, with rise times less than 250 ps and prompt decay constants in the range of 2.1–2.85 ns. Additionally, the separation between Cherenkov and scintillation light is quantified using cosmic muons in the CHESS experiment for each formulation, demonstrating an improvement in separation at the centimeter scale. Finally, we briefly discuss the prospects for large-scale detectors.

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“…The targets are simulated using properties from [14,15,42,44,45]. The scintillation light yield is set to 1010 photons/MeV for LAB [44] and 10800 photons/MeV for LAB/PPO [15].…”

Section: Prospects With Liquid Scintillator Targetsmentioning

confidence: 99%

Experiment to demonstrate separation of Cherenkov and scintillation signals

et al. 2017

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The ability to separately identify the Cherenkov and scintillation light components produced in scintillating mediums holds the potential for a major breakthrough in neutrino detection technology, allowing development of a large, low-threshold, directional detector with a broad physics program. The CHESS (CHErenkov / Scintillation Separation) experiment employs an innovative detector design with an array of small, fast photomultiplier tubes and state-of-the-art electronics to demonstrate the reconstruction of a Cherenkov ring in a scintillating medium based on photon hit time and detected photoelectron density. This paper describes the physical properties and calibration of CHESS along with first results. The ability to reconstruct Cherenkov rings is demonstrated in a water target, and a time precision of 338 ± 12 ps FWHM is achieved. Monte Carlo based predictions for the ring imaging sensitivity with a liquid scintillator target predict an efficiency for identifying Cherenkov hits of 94 ± 1% and 81 ± 1% in pure linear alkyl benzene (LAB) and LAB loaded with 2 g/L of PPO, respectively, with a scintillation contamination of 12 ± 1% and 26 ± 1%.

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Metal-loaded organic scintillators for neutrino physics

Cited by 44 publications

References 115 publications

Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

Characterization of water-based liquid scintillator for Cherenkov and scintillation separation

Experiment to demonstrate separation of Cherenkov and scintillation signals

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