A5051316196- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Advanced NMR Techniques and Applications
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Electric Vehicles and Infrastructure
- Advanced Battery Technologies Research
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Particle Accelerators and Free-Electron Lasers
- Metal and Thin Film Mechanics
- Photocathodes and Microchannel Plates
- Electromagnetic Compatibility and Measurements
- Plasma Diagnostics and Applications
- Radiation Detection and Scintillator Technologies
- Astronomical and nuclear sciences
- Vehicle emissions and performance
- Particle Detector Development and Performance
Hampton University
2018-2024
Manav Rachna International Institute of Research and Studies
2024
University of California, Riverside
2024
Rutgers, The State University of New Jersey
2023
Thomas Jefferson National Accelerator Facility
2019-2022
Virginia Military Institute
2022
Virginia Tech
2022
Massachusetts Institute of Technology
2019
We report a precision measurement of the parity-violating asymmetry $A_{PV}$ in elastic scattering longitudinally polarized electrons from $^{208}$Pb. measure $A_{PV}=550\pm 16 {\rm (stat)}\pm 8\ (syst)}$ parts per billion, leading to an extraction neutral weak form factor $F_W(Q^2 = 0.00616\ GeV}^2) 0.368 \pm 0.013$. Combined with our previous measurement, extracted neutron skin thickness is $R_n-R_p=0.283 0.071$~fm. The result also yields first significant direct interior density...
We report a precise measurement of the parity-violating (PV) asymmetry A_{PV} in elastic scattering longitudinally polarized electrons from ^{48}Ca. measure A_{PV}=2668±106(stat)±40(syst) parts per billion, leading to an extraction neutral weak form factor F_{W}(q=0.8733 fm^{-1})=0.1304±0.0052(stat)±0.0020(syst) and charge minus F_{ch}-F_{W}=0.0277±0.0055. The resulting neutron skin thickness R_{n}-R_{p}=0.121±0.026(exp)±0.024(model) fm is relatively thin yet consistent with many model...
The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by MARATHON experiment from measurements deep inelastic scattering electrons ^{3}H and ^{3}He nuclei. was performed in Hall A Facility Jefferson Lab using two high-resolution spectrometers for electron detection, a cryogenic target system which included low-activity tritium cell. data analysis used novel technique exploiting mirror symmetry nuclei, essentially eliminates many theoretical uncertainties...
To probe CP violation in the leptonic sector using GeV energy neutrino beams current and future experiments argon detectors, precise models of complex underlying antineutrino interactions are needed. The E12-14-012 experiment at Jefferson Lab Hall A was designed to perform a combined analysis inclusive exclusive electron scatterings on both ($N = 22$) titanium ($Z nuclei beams. measurement nucleus provides essential information understand scattering argon, large contribution which comes from...
The success of the ambitious programs both long- and short-baseline neutrino-oscillation experiments employing liquid-argon time-projection chambers will greatly rely on precision with which weak response argon nucleus can be estimated. In E12-14-012 experiment at Jefferson Lab Hall A, we have studied properties by scattering a high-quality electron beam off high-pressure gaseous target. Here, present measured $^{40}$Ar$(e,e^{\prime})$ double differential cross section incident energy...
Quasielastic $^{12}$C$(e,e'p)$ scattering was measured at space-like 4-momentum transfer squared $Q^2$~=~8, 9.4, 11.4, and 14.2 (GeV/c)$^2$, the highest ever achieved to date. Nuclear transparency for this reaction extracted by comparing yield that expected from a plane-wave impulse approximation calculation without any final state interactions. The consistent with no $Q^2$ dependence, up proton momenta of 8.5~GeV/c, ruling out quantum chromodynamics effect color scales in exclusive...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has measured the $(e, e'p)$ cross section parallel kinematics using a natural argon target. Here, we report full results of analysis data set corresponding to beam energy 2.222 GeV, and spanning missing momentum range $15 \lesssim p_m 300$ MeV/c $12 E_m 80$ MeV. reduced section, determined as function $p_m$ $E_m$ with $\approx$4\% accuracy, been fitted Monte Carlo simulations involving model spectral including effects final state...
We report precision determinations of the beam-normal single spin asymmetries (A_{n}) in elastic scattering 0.95 and 2.18 GeV electrons off ^{12}C, ^{40}Ca, ^{48}Ca, ^{208}Pb at very forward angles where most detailed theoretical calculations have been performed. The first measurements A_{n} for ^{40}Ca ^{48}Ca are found to be similar that consistent with expectations thus demonstrating validity nuclei Z≤20. also two new momentum transfers (Q^{2}) extending previous measurement. Our data...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has measured the (e,e'p) cross section parallel kinematics using a natural titanium target. Here, we report full results of analysis data set corresponding to beam energy 2.2 GeV, and spanning missing momentum range 15 <= pm 250 MeV/c 12 Em 80 MeV. reduced been with ~7% accuracy as function both energy. We compared our Monte Carlo simulations model spectral including effects final state interactions. overall agreement between is...
We report the first measurement of (e,e′p) three-body breakup reaction cross sections in helium-3 (3He) and tritium (3H) at large momentum transfer [⟨Q2⟩≈1.9 (GeV/c)2] xB>1 kinematics, where section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40≤pmiss≤500 MeV/c that, QE limit with no rescattering, equals initial probed nucleon. measured are compared state-of-the-art ab initio calculations. Overall good agreement, within ±20%, is...
We report the first measurement of $(e,e'p)$ reaction cross-section ratios for Helium-3 ($^3$He), Tritium ($^3$H), and Deuterium ($d$). The covered a missing momentum range $40 \le p_{miss} 550$ MeV$/c$, at large transfer ($\langle Q^2 \rangle \approx 1.9$ (GeV$/c$)$^2$) $x_B>1$, which minimized contributions from non quasi-elastic (QE) mechanisms. data is compared with plane-wave impulse approximation (PWIA) calculations using realistic spectral functions distributions. measured...
The E12-14-012 experiment performed at Jefferson Lab Hall A has collected inclusive electron-scattering data for different targets the kinematics corresponding to beam energy 2.222 GeV and scattering angle 15.54 deg. Here we present a comprehensive analysis of compare double-differential cross sections electrons, extracted using solid (aluminum, carbon, titanium) closed argon-gas cell. extend over broad range transfer, where quasielastic interaction, Delta-resonance excitation, inelastic...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has collected exclusive electron-scattering data (e,e$^\prime$p) parallel kinematics using natural argon and titanium targets. Here, we report the first results of analysis set corresponding to beam energy 2,222 MeV, electron scattering angle 21.5 deg, proton emission -50 deg. differential cross sections, measured with $\sim$4% uncertainty, have been studied as a function missing momentum, compared Monte Carlo simulations,...
A mass spectroscopy experiment with a pair of nearly identical high-resolution spectrometers and tritium target was performed in Hall at Jefferson Lab. Utilizing the (e,e′K+) reaction, enhancements, which may correspond to possible Λnn resonance ΣNN states, were observed an energy resolution about 1.21 MeV (σ), although greater statistics are needed make definitive identifications. An experimentally measured state provide unique constraint determining Λn interaction, for no scattering data...
$^{2}\mathrm{H}(e,e'p)n$ cross sections have been measured at 4-momentum transfers of $Q^{2} = 4.5 \pm 0.5$ (GeV/c)$^{2}$ over a range neutron recoil momenta, $p_{\mathrm{r}}$, reaching up to $\sim1.0$ GeV/c. The data were obtained fixed angles $\theta_{nq} 35^\circ$, $45^\circ$ and $75^{\circ}$ with respect the 3-momentum transfer $\vec q$. new agree well previous which reached $p_{\mathrm{r}}\sim500$ MeV/c. At 35^\circ$ $45^\circ$, final state interactions (FSI), meson exchange currents...
The ratio of the nucleon $F_2$ structure functions, $F_2^n/F_2^p$, is determined by MARATHON experiment from measurements deep inelastic scattering electrons $^3$H and $^3$He nuclei. was performed in Hall A Facility Jefferson Lab used two high resolution spectrometers for electron detection, a cryogenic target system which included low-activity tritium cell. data analysis novel technique exploiting mirror symmetry nuclei, essentially eliminates many theoretical uncertainties extraction...
The nuclear dependence of the inclusive inelastic electron scattering cross section (the EMC effect) has been measured for first time in $^{10}$B and $^{11}$B. Previous measurements effect $A \leq 12$ nuclei showed an unexpected dependence; $^{11}$B were to explore this region more detail. Results are presented $^9$Be, $^{10}$B, $^{11}$B, $^{12}$C at incident beam energy 10.6~GeV. boron isotopes was found be similar that $^9$Be $^{12}$C, yielding almost no range $A=4-12$. This represents...
The electromagnetic form factors of the proton and neutron encode information on spatial structure their charge magnetization distributions. While measurements are relatively straightforward, lack a free target makes neutron’s more challenging sensitive to experimental or model-dependent uncertainties. Various experiments have attempted extract from scattering in deuterium, with different techniques providing different, sometimes large, systematic We present results novel measurement...
<div class="section abstract"><div class="htmlview paragraph">Electric Vehicle battery failure may lead to the release of toxic gas with fire and in some cases explosion. To take care these safety issues well defined standards their regular upgradation is done based on recommendation Automotive Industry Standards Committee (AISC) through Research Association India (ARAI). Electric vehicles that are compliance also facing issues. The aim research further strengthen so a vehicle...
The small binding energy of the hypertrition leads to predictions non-existence bound hypernuclei for isotriplet three-body systems such as $nn\Lambda$. However, invariant mass spectroscopy at GSI has reported events that may be interpreted $nn\Lambda$ state. state was sought by missing-mass via $(e,e'K^+)$ reaction Jefferson Lab's experimental Hall A. present experiment higher sensitivity $nn\Lambda$-state investigation in terms better precision a factor about three. analysis shown this...