A5101431947- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Protist diversity and phylogeny
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Genomics and Phylogenetic Studies
- Particle Accelerators and Free-Electron Lasers
- CCD and CMOS Imaging Sensors
- Superconducting Materials and Applications
- Microbial Community Ecology and Physiology
- Radioactive Decay and Measurement Techniques
- Geophysics and Gravity Measurements
- Radiation Effects in Electronics
Lawrence Livermore National Laboratory
2013-2024
Oak Ridge National Laboratory
2015-2024
Brookhaven National Laboratory
2006-2019
RIKEN BNL Research Center
2006-2019
Abilene Christian University
2003-2018
Banaras Hindu University
2003-2018
Augustana University
2014-2018
Charles University
2018
Middle Tennessee State University
2016-2018
Jeonbuk National University
2018
The coherent elastic scattering of neutrinos off nuclei has eluded detection for four decades, even though its predicted cross section is by far the largest all low-energy neutrino couplings. This mode interaction offers new opportunities to study properties and leads a miniaturization detector size, with potential technological applications. We observed this process at 6.7σ confidence level, using low-background, 14.6-kilogram CsI[Na] scintillator exposed emissions from Spallation Neutron...
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{...
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,...
The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg isotopically enriched liquid-xenon time projection chamber. This improvement two orders magnitude over current limits obtained by significant increase the mass, monolithic and homogeneous configuration active medium, multi-parameter measurements...
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 projected performance and detector configuration of nEXO are described in this pre-Conceptual Design Report (pCDR). is a tonne-scale neutrinoless double beta ($0νββ$) decay search $^{136}$Xe, based on the ultra-low background liquid xenon technology validated by EXO-200. With $\simeq$ 5000 kg enriched to 90% isotope 136, has half-life sensitivity approximately $10^{28}$ years. This represents an improvement about two orders magnitude with respect current results. Based experience gained...
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...
Efficient, readily-available, low-cost, high-energy neutron detectors can play a central role in detecting illicit nuclear weapons since neutrons are strong indication for the presence of fissile material such as Plutonium and Highly-Enriched Uranium. The main challenge fast consists discrimination signal from gamma radiation background. At present, only well-investigated organic crystal scintillator detection, n/gamma mixed field, is stilbene, which while offering good pulse shape...
The COHERENT experiment is well poised to test sub-GeV dark matter models using low-energy recoil detectors sensitive coherent elastic neutrino-nucleus scattering (CEvNS) in the $\pi$-DAR neutrino beam produced by Spallation Neutron Source. We show how a planned 750-kg liquid argon scintillation detector would place leading limits on scalar light models, over two orders of magnitude mass, for particles through vector and leptophobic portals absence other effects beyond standard model....
Abstract A thorough understanding of neutrino–nucleus scattering physics is crucial for the successful execution entire US neutrino program. Neutrino–nucleus interaction constitutes one biggest systematic uncertainties in experiments—both at intermediate energies affecting long-baseline deep underground experiment, as well low coherent program—and could be difference between achieving or missing discovery level precision. To this end, electron–nucleus experiments provide vital information to...
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...
Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting $178\,\text{nm}$ scintillation light, order achieve an energy resolution of $\sigma / Q_{\beta\beta} =...
Coherent elastic neutrino-nucleus scattering (CEvNS) is the dominant neutrino channel for neutrinos of energy $E_\nu < 100$ MeV. We report a limit this process using data collected in an engineering run 29 kg CENNS-10 liquid argon detector located 27.5 m from Oak Ridge National Laboratory Spallation Neutron Source (SNS) Hg target with $4.2\times 10^{22}$ protons on target. The dataset yielded $< 7.4$ observed CEvNS events implying cross section process, averaged over SNS pion decay-at-rest...
A new framework for evaluating hydrodynamic models of relativistic heavy ion collisions has been developed. This framework, a comprehensive model evaluation and reporting algorithm (CHIMERA) implemented by augmenting UVH 2+1D viscous with eccentricity fluctuations, pre-equilibrium flow, the ultrarelativistic quantum molecular dynamic (UrQMD) hadronic cascade. range initial temperatures shear viscosity to entropy ratios were evaluated four profiles, ${N}_{\mathrm{part}}$ ${N}_{\mathrm{coll}}$...
Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one heaviest targets for which low-energy (≤50 MeV) inelastic neutrino-nucleus processes have been measured, and this first measurement of its section. After a five-year detector exposure, reports flux-averaged electron 9.2_{-1.8}^{+2.1}×10^{-40} cm^{2}....
Dinoflagellates are a group of unicellular protists with immense ecological and evolutionary significance cell biological diversity. Of the photosynthetic dinoflagellates, majority possess plastid containing pigment peridinin, whereas some lineages have replaced this by serial endosymbiosis plastids distinct affiliations, including fucoxanthin pigment-containing haptophyte origin. Previous studies described presence widespread substitutional RNA editing in peridinin genes. Because reports...