D. Chernyak
A5008538581- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Particle Detector Development and Performance
- Radioactive contamination and transfer
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Advanced NMR Techniques and Applications
- Atmospheric Ozone and Climate
- Medical Imaging Techniques and Applications
- Advanced Semiconductor Detectors and Materials
- Superconducting Materials and Applications
- Solar and Space Plasma Dynamics
- Mathematical Approximation and Integration
- Foreign Language Teaching Methods
- Superconducting and THz Device Technology
- Educational Innovations and Challenges
- Pulsars and Gravitational Waves Research
University of Alabama
2021-2024
University of South Dakota
2020-2023
Kavli Institute for the Physics and Mathematics of the Universe
2017-2023
The University of Tokyo
2017-2023
McGill University
2023
Laurentian University
2023
Snolab
2023
Institute of Sociology
2020
National University of Technology
2020
Institute for Nuclear Research
2010-2019
We report the first measurement of coherent elastic neutrino-nucleus scattering (CEvNS) on argon using a liquid detector at Oak Ridge National Laboratory Spallation Neutron Source. Two independent analyses prefer CEvNS over background-only null hypothesis with greater than $3\ensuremath{\sigma}$ significance. The measured cross section, averaged incident neutrino flux, is $(2.2\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}39}\text{ }\text{...
The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search upgraded detector with almost double amount of xenon and ultralow radioactivity container, corresponding to exposure 970 kg yr ^{136}Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation xenon, have required use novel background rejection...
We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in high flux neutrinos produced at Spallation Neutron Source Oak Ridge National Laboratory. New data collected before detector decommissioning have more than doubled dataset since first observation CEvNS, achieved with this detector. Systematic uncertainties also been reduced an updated quenching model, allowing for improved precision. With these analysis improvements,...
This paper introduces the neutrinoless double-beta decay (the rarest nuclear weak process) and describes status of research for this transition, both from point view theoretical physics in terms present future experimental scenarios. Implications phenomenon on crucial aspects particle are briefly discussed. The calculations matrix elements case mass mechanisms reviewed, a range these quantities is proposed most appealing candidates. After introducing general concepts—such as choice best...
This paper reports on the development of a technology involving $$^{100}\hbox {Mo}$$ -enriched scintillating bolometers, compatible with goals CUPID, proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( $$\sim 1~\hbox {kg}$$ ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced used develop performance single detector modules based 0.2–0.4 kg bolometers. In particular, energy resolution...
The Advanced Molybdenum-based Rare process Experiment (AMoRE) aims to search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^{100}$Mo with $\sim$100 kg $^{100}$Mo-enriched molybdenum embedded in cryogenic detectors a dual heat and light readout. At the current, pilot stage AMoRE project we employ six calcium molybdate crystals total mass 1.9 kg, produced from $^{48}$Ca-depleted ($^{48\textrm{depl}}$Ca$^{100}$MoO$_4$). simultaneous detection heat(phonon) scintillation (photon)...
Abstract The nEXO neutrinoless double beta (0 νββ ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon search for the in 136 Xe. Progress detector design, paired with higher fidelity its simulation an advanced data analysis, based on one used final results EXO-200, produce sensitivity prediction that exceeds half-life 10 28 years. Specifically, improvements have been made understanding production scintillation photons charge as...
The COHERENT Collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220 MeV/c^{2} using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9 keV_{nr}. No evidence is found we thus place limits on allowed parameter space. With this low-threshold detector, are coherent elastic scattering nuclei. cross section process orders of magnitude higher than other processes historically used accelerator-based...
The double-beta decay of $^{116}\mathrm{Cd}$ has been investigated with the help radiopure enriched $^{116}\mathrm{Cd}{\mathrm{WO}}_{4}$ crystal scintillators (mass 1.162 kg) at Gran Sasso underground laboratory. half-life relative to $2\ensuremath{\nu}2\ensuremath{\beta}$ ground state $^{116}\mathrm{Sn}$ was measured highest up-to-date accuracy as ${T}_{1/2}=(2.6{3}_{\ensuremath{-}0.12}^{+0.11})\ifmmode\times\else\texttimes\fi{}{10}^{19}\text{ }\text{ }\mathrm{yr}$. A new improved limit on...
We present a precision analysis of the $^{136}$Xe two-neutrino $\beta\beta$ electron spectrum above 0.8 MeV, based on high-statistics data obtained with KamLAND-Zen experiment. An improved formalism for rate allows us to measure ratio leading and subleading $2\nu\beta\beta$ nuclear matrix elements (NMEs), $\xi^{2\nu}_{31} = -0.26^{+0.31}_{-0.25}$. Theoretical predictions from shell model majority quasiparticle random-phase approximation (QRPA) calculations are consistent experimental limit....
We report on a search for electron antineutrinos ($\bar{\nu}_e$) from astrophysical sources in the neutrino energy range 8.3 to 30.8 MeV with KamLAND detector. In an exposure of 6.72 kton-year liquid scintillator, we observe 18 candidate events via inverse beta decay reaction. Although there is large background uncertainty neutral current atmospheric interactions, find no significant excess over model predictions. Assuming several supernova relic spectra, give upper flux limits 60--110...
A search for double $\ensuremath{\beta}$ processes in ${}^{106}$Cd was carried out at the Gran Sasso National Laboratories of INFN (Italy) with help a ${}^{106}$CdWO${}_{4}$ crystal scintillator (215 g) enriched up to 66$%$. After 6590 h data taking, new improved half-life limits on decay were established level ${10}^{19}$--${10}^{21}$ yr; particular,...
The LUMINEU program aims at performing a pilot experiment on neutrinoless double beta decay of 100Mo using radiopure ZnMoO4 crystals operated as cryogenic scintillating bolometers. Growth high quality is complex task, since there are no commercial molybdenum compounds available with the required level purity and radioactive contamination. This paper discusses approaches to purify synthesize for crystal growth. A combination sublimation (with addition zinc molybdate) subsequent...
Two neutrino double $\beta$ decay can create irremovable background even in high energy resolution detectors searching for neutrinoless due to random coincidence of $2\nu2\beta$ events case poor time resolution. Possibilities suppress this cryogenic scintillating bolometers are discussed. It is shown that the present bolometric detector technologies enable control form at level required explore inverted hierarchy mass pattern, including $^{100}$Mo, which characterized by a relatively short...
Abstract This article describes a radon emanation measurement technique using liquid scintillator counting. A model for loading and transport is described, along with its calibration. Detector background blank have been studied quantified. The Minimal detectable activity has determined the counting setup toy Monte Carlo simulation. validated butyl rubber sample previously used cross-calibration between different facilities.
Search for neutrino-less double beta decay of <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">100</sup> Mo is proposed using active method with Ca MoO <sub xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> scintillation crystals which show the brightest light among variety inorganic materials containing Mo. Study X-ray luminescence and properties such as energy response, number photoelectrons/keV, absolute yield, time, pulse shape...
A cadmium tungstate crystal boule enriched in $^{116}$Cd to 82% with mass of 1868 g was grown by the low-thermal-gradient Czochralski technique. The isotopic composition and trace contamination were estimated High Resolution Inductively Coupled Plasma Mass-Spectrometry. scintillators produced from subjected characterization that included measurements transmittance energy resolution. low background scintillation detector two $^{116}$CdWO$_4$ (586 589 g) developed. running over 1727 h deep...
AMoRE (Advanced Mo based Rare process Experiment) collaboration is going to use calcium molybdate crystals as cryogenic scintillation detector in a search for neutrinoless DBD of 100Mo isotope. Simultaneous detection phonons and light will be used reject internal background. A FWHM resolution 0.2% the phonon channel has been achieved with 0.5 cm3 crystal. Several 40Ca100MoO4 (≈ kg) have developed from enriched depleted 40Ca materials. The yield these shown comparable reference CaMoO4...
A radiopure cadmium tungstate crystal scintillator, enriched in $^{106}\mathrm{Cd}$ to 66%, with mass of 216 g $(^{106}\mathrm{Cd}{\text{WO}}_{4})$, was used search for double-$\ensuremath{\beta}$ decay processes coincidence four ultra-low-background high-purity germanium detectors a single cryostat. Improved limits on the have been set level ${10}^{20}\ensuremath{-}{10}^{21}$ yr after 13 085 h data taking. In particular, half-life limit two-neutrino electron capture positron emission,...
The LUMINEU project is a demonstrator experiment that will search for the neutrinoless double beta decay of isotope $$^{100}$$ Mo embedded in zinc molybdate (ZnMoO $$_4$$ ) scintillating bolometers. In this context, crystal boule enriched to 99.5 % with mass 171 g was grown first time by low-thermal-gradient Czochralski technique. production cycle provided high yield (the 84 initial charge) and an acceptable level—around 4 %—of irrecoverable losses costly material. Two crystals 59 63 g,...
The LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) project envisages a high-sensitivity search neutrinoless double beta (0ν 2β) decay of 100Mo with the help scintillating bolometers based on zinc molybdate (ZnMoO4) crystals. One crucial points successful performance this experiment is development protocol producing high quality large ZnMoO4 crystal scintillators extremely internal radiopurity. Here we report significant progress in volume crystalline...
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as by-product this operation, an intense neutrinos via stopped-pion decay. COHERENT collaboration uses to investigate coherent elastic neutrino-nucleus scattering and other physics with suite detectors. This work includes description our geant4 simulation neutrino production the SNS flux calculation which informs studies. We estimate uncertainty $\ensuremath{\sim}10%$ level based on...