Spectroscopy of electron-induced fluorescence in organic liquid scintillators

Undagoitia, T. Marrodán; Feilitzsch, F. von; Oberauer, L.; Potzel, W.; Ulrich, A.; Winter, J.; Wurm, M.

doi:10.1140/epjd/e2010-00004-1

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…The yield of scintillating photons was set to 10 photons/keV in the energy loss during the step length. The spectral response of scintillation lights by electrons in Ultima Gold was taken from [4]. The photons were simulated by taking into account optical processes on boundary inside the optical chamber.…”

Section: Methodsmentioning

confidence: 99%

Validation of beta ray scintillation spectra in liquid scintillation counter using Geant4 simulation

Aso

Hara

Ogiwara

et al. 2014

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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Liquid scintillation counter (LSC) has been used as a very efficient technique for a quantitative measurement of radioactivity. The LSC has been the most powerful tool in the fields of low level environmental radioactivity monitoring and the detection of low energy beta decay events of radioactivity. In LSC the sample is dissolved in a liquid scintillation cocktail in a sample vial. In order to quantify the nuclear decay in terms of activity, the LSC counts the number of flashes of scintillation lights. However, the sample's count rate varies with the detection efficiency that depends on the energy conversion from the released beta ray energy in nuclear decay to light flashes. Since the sample solution absorbs part of nuclear decay energy and photons of scintillation lights, which is known as quench, the observed count rate becomes less than the expected rate from actual energy. Therefore the compensation of count rate loss is essential to determine the sample's activity. There are many techniques to determine the efficiency, however, it is known that those techniques lead different results especially in low energy beta decay radionuclides such as 3 H. In order to investigate the influence of quench phenomena in LSC, we developed a Geant4 based Monte Carlo simulation and validated the beta-ray scintillation spectra in LSC. The simulation takes into account radioactive decay, flashes of scintillation lights, and transportation of optical photons including reflection and refraction characteristics at material boundaries. In this paper, we report on the detail of our simulation and the comparison of beta ray spectra detected in LSC between the simulation and measurements.

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Section: Methodsmentioning

confidence: 99%

Validation of beta ray scintillation spectra in liquid scintillation counter using Geant4 simulation

Aso

Hara

Ogiwara

et al. 2014

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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“…A common primary fluor is 2,5-diphenyloxazole (PPO) [18,51,52,[55][56][57][62][63][64][65][66]68]. Other fluors with similar optical properties to PPO include 2-(4-biphenyl)-5-phenyl-1,3,4oxadiazole (PBD), 2-(4-biphenyl)-5-(4-tert-butyl-phenyl)-1,3,4-oxadiazole (butyl-PBD), 2-(4-biphenyl)-5-phenyloxazole (BPO), and p-terphenyl (p-TP) [42,[69][70][71][72].…”

Section: Liquid Scintillator Materialsmentioning

confidence: 99%

“…As secondary wavelength shifters, 4-bis-(2-methyl-styryl)-benzene (bis-MSB), 1,4bis(5-phenyloxazol-2-yl)-benzene (POPOP), and 1-phenyl-3-mesityl-2-pyrazoline (PMP) are often used [18,42,51,56,57,[62][63][64][65][66]68,72]. bis-MSB performs well with PPO and p-TP and has a shorter decay time than POPOP.…”

Section: Liquid Scintillator Materialsmentioning

confidence: 99%

Review of Novel Approaches to Organic Liquid Scintillators in Neutrino Physics

S.¹

2022

Symmetry

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Organic liquid scintillators have been used for decades in many neutrino physics experiments. They are particularly suited for the detection of low-energy neutrinos where energy and timing information is required. Organic liquid scintillators exhibit advantages such as high light yield, cost effectiveness, radio purity, and more. However, they also entail disadvantages, most prominently a lack of vertex resolution and particle identification. In recent years, various novel ideas have emerged to improve the performance of organic liquid scintillators. In this review, novel approaches to organic liquid scintillators in neutrino experiments as of 2022 are reviewed and their prospects and applications compared.

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The next-generation liquid-scintillator neutrino observatory LENA

Wurm

Beacom

Bezrukov

et al. 2012

Astroparticle Physics

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2As part of the European LAGUNA design study on a next-generation neutrino detector, we propose the liquid-scintillator detector LENA (Low Energy Neutrino Astronomy) as a multipurpose neutrino observatory. The outstanding successes of the Borexino and KamLAND experiments demonstrate the large potential of liquid-scintillator detectors in low-energy neutrino physics. Low energy threshold, good energy resolution and efficient background discrimination are inherent to the liquidscintillator technique. A target mass of 50 kt will offer a substantial increase in detection sensitivity.At low energies, the variety of detection channels available in liquid scintillator will allow for an energy-and flavor-resolved analysis of the neutrino burst emitted by a galactic Supernova. Due to target mass and background conditions, LENA will also be sensitive to the faint signal of the Diffuse Supernova Neutrino Background. Solar metallicity, time-variation in the solar neutrino flux and deviations from MSW-LMA survival probabilities can be investigated based on unprecedented statistics. Low background conditions allow to search for dark matter by observing rare annihilation neutrinos. The large number of events expected for geoneutrinos will give valuable information on the abundances of Uranium and Thorium and their relative ratio in the Earth's crust and mantle. Reactor neutrinos enable a high-precision measurement of solar mixing parameters. A strong radioactive or pion decay-at-rest neutrino source can be placed close to the detector to investigate neutrino oscillations for short distances and sub-MeV to MeV energies.At high energies, LENA will provide a new lifetime limit for the SUSY-favored proton decay mode into kaon and antineutrino, surpassing current experimental limits by about one order of magnitude. Recent studies have demonstrated that a reconstruction of momentum and energy of GeV particles is well feasible in liquid scintillator. Monte Carlo studies on the reconstruction of the complex event topologies found for neutrino interactions at multi-GeV energies have shown promising results. If this is confirmed, LENA might serve as far detector in a long-baseline neutrino oscillation experiment currently investigated in LAGUNA-LBNO.3

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Spectroscopy of electron-induced fluorescence in organic liquid scintillators

Cited by 8 publications

References 13 publications

Validation of beta ray scintillation spectra in liquid scintillation counter using Geant4 simulation

Validation of beta ray scintillation spectra in liquid scintillation counter using Geant4 simulation

Review of Novel Approaches to Organic Liquid Scintillators in Neutrino Physics

The next-generation liquid-scintillator neutrino observatory LENA

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