James J. Kelly
A5088705234- Quantum Chromodynamics and Particle Interactions
- Copper Interconnects and Reliability
- Electrodeposition and Electroless Coatings
- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- Semiconductor materials and devices
- Electronic Packaging and Soldering Technologies
- Atomic and Subatomic Physics Research
- Semiconductor materials and interfaces
- Advanced NMR Techniques and Applications
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- 3D IC and TSV technologies
- Metal and Thin Film Mechanics
- Corrosion Behavior and Inhibition
- Advanced Chemical Physics Studies
- Anodic Oxide Films and Nanostructures
- Advancements in Photolithography Techniques
- Quantum, superfluid, helium dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Astronomical and nuclear sciences
- Nanoporous metals and alloys
- Electrochemical Analysis and Applications
IBM (United States)
2012-2022
Samsung (United States)
2017-2019
University of Maryland, College Park
2004-2018
University of Notre Dame
2017
GlobalFoundries (United States)
2017
Weatherford College
2016
Albany Technical College
2015
Albany Molecular Research (United States)
2012
IBM Research - Thomas J. Watson Research Center
2005-2009
Sandia National Laboratories
2005-2008
The ratio of the electric and magnetic form factors proton, GEp/GMp, was measured at Thomas Jefferson National Accelerator Facility (JLab) using recoil polarization technique. is directly proportional to transverse longitudinal components proton in elastic $\vec ep \to e\vec p$ reaction. new data presented this article span range 3.5 < Q2 5.6 GeV2 are well described by a linear fit. Also, QF2p/F1p reaches constant value above Q2=2 GeV2.
This Brief Report provides simple parametrizations of the nucleon electromagnetic form factors using functions ${Q}^{2}$ that are consistent with dimensional scaling at high ${Q}^{2}$. Good fits require only four parameters each for ${G}_{Ep}$, ${G}_{Mp}$, and ${G}_{Mn}$ two ${G}_{En}$.
The ratio of the proton elastic electromagnetic form factors, ${G}_{\mathit{Ep}}/{G}_{\mathit{Mp}}$, was obtained by measuring ${P}_{t}$ and ${P}_{\ensuremath{\ell}}$, transverse longitudinal recoil polarization components, respectively, for $\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}e\stackrel{\ensuremath{\rightarrow}}{p}$reaction in four-momentum transfer squared range 0.5 to $3.5\phantom{\rule{0.3em}{0ex}}\text{GeV}{}^{2}$. In single-photon exchange approximation,...
The addition of polyethylene glycol (PEG) and to an acid copper electrolyte inhibits the deposition reaction for cathodic overpotentials up about 150 mV. Adding only promotes reaction, while adding PEG alone has a relatively small effect on electrode kinetics. Frequency shifts electrochemical quartz crystal microbalance suggest adsorption monolayer molecules that are collapsed into spheres provided chloride ions present, with little occurring when is absent. This behavior same gold surfaces....
We present measurements of the ratio proton elastic electromagnetic form factors, μpGEp/GMp. The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine longitudinal and transverse components recoil polarization in ep scattering; these is proportional two factors. These data reproduce observation Jones et al. [Phys. Rev. Lett. 84, 1398 (2000)], that factor decreases significantly from unity above Q2=1GeV2.Received 29 May 2001DOI:https://doi.org/10.1103/PhysRevC.64.038202©2001...
The roles of two model additives, bis(3‐sulfopropyl) disulfide (SPS) and Janus Green B (JGB), in the deposition copper from an acid‐copper sulfate electrolyte containing polyethylene glycol (PEG) were studied by on microprofiled electrodes, scanning electron microscopy (SEM), transmission (TEM). It was found that leveling occurs only when all four additives are present, suggesting additive‐additive interactions important to mechanism. Moreover, optimal flux active agent exists, effect may be...
Electrochemical impedance spectroscopy (EIS) results are shown and interpreted with regard to other recent experimental studies for copper deposition in the presence of polyethylene glycol . The model assumes adsorption a nearly complete monolayer PEG chloride ions no without primary effect which does not appear vary time during an EIS measurement, is blocking available surface sites charge transfer. effectively predicts changes steady‐state concentration rotation rate on rotating disk electrode.
We have measured the parity-violating electroweak asymmetry in elastic scattering of polarized electrons from protons. Significant contributions to this could arise strange form factors nucleon. The is $A=\ensuremath{-}15.05\ifmmode\pm\else\textpm\fi{}0.98(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.56(\mathrm{syst})\phantom{\rule{0.3em}{0ex}}\mathrm{ppm}$ at kinematic point $⟨{\ensuremath{\theta}}_{\mathrm{lab}}⟩=12.3\ifmmode^\circ\else\textdegree\fi{}$ and...
We report on measurements of the neutron spin asymmetries An1,2 and polarized structure functions gn1,2 at three kinematics in deep inelastic region, with x=0.33, 0.47, 0.60 Q2=2.7, 3.5, 4.8(GeV∕c)2, respectively. These were performed using a 5.7GeV longitudinally electron beam 3He target. The results for An1 gn1 x=0.33 are consistent previous world data and, two higher-x points, have improved precision by about an order magnitude. new show zero crossing around x=0.47 value x=0.60 is...
The electric form factor of the neutron was determined from measurements $\stackrel{\ensuremath{\rightarrow}}{d}(\stackrel{\ensuremath{\rightarrow}}{e},{e}^{\ensuremath{'}}n)p$ reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia ($^{15}\mathrm{N}\mathrm{D}_{3}$) target in which deuteron polarization perpendicular to momentum transfer. detected magnetic spectrometer coincidence with neutrons large solid angle detector. We find...
Recoil proton polarization observables were measured for both the p(e→,e′p→) and d(e→,e′p→)n reactions at two values of Q2 using a newly commissioned focal plane polarimeter MIT-Bates Linear Accelerator Center. The hydrogen deuterium spin-dependent Dℓℓ Dℓt, induced Pn, form factor ratio GEp/GMp under identical kinematics. results are in good agreement with each other plane-wave impulse approximation (PWIA).Received 8 August 1997DOI:https://doi.org/10.1103/PhysRevLett.80.452©1998 American...
Relativistic prescriptions relating Sachs form factors to nucleon charge and magnetization densities are used fit recent data for both the proton neutron. The analysis uses expansions in complete radial bases minimize model dependence estimate uncertainties due limitation of range momentum transfer. We find that distribution is significantly broad than its density slightly broader neutron proton. factor consistent with Galster parametrization over available Q^2, but relativistic inversion...
The H2(e,e’n)1H quasielastic cross section was measured at Q2 values of 0.109, 0.176, and 0.255 (GeV/c)2. neutron detection efficiency determined by the associated particle technique with H2(γ,pn) reaction for each three kinetic energies. These H2(e,e’n) measurements coincidence sections are first low Q2. sensitive primarily to magnetic form factor GMn these kinematics. extracted have smaller uncertainties than previous data consistent dipole parametrization two higher momentum transfers;...
We have measured the neutron spin asymmetry A(n)(1) with high precision at three kinematics in deep inelastic region x=0.33, 0.47, and 0.60, Q(2)=2.7, 3.5, 4.8 (GeV/c)(2), respectively. Our results unambiguously show, for first time, that crosses zero around x=0.47 becomes significantly positive x=0.60. Combined world proton data, polarized quark distributions were extracted. results, general, agree relativistic constituent models perturbative quantum chromodynamics (PQCD) analyses based on...
The electric form factor of the neutron was determined from studies reaction ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e},{e}^{\ensuremath{'}}n)pp$ in quasielastic kinematics Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a target which nuclear polarization oriented perpendicular to momentum transfer. detected magnetic spectrometer coincidence with neutrons that registered large-solid-angle detector. More than...
This paper was published online on 20 May 2005 without several of the authors’ corrections incorporated. Equation (13) has been replaced. The captions Figs. 16–18 have also Typographical errors pages 4, 6, 14, 15, 18, 19, 22, and 24 all corrected. corrected as 8 June 2005. text is correct in printed version journal.Received 6 2005DOI:https://doi.org/10.1103/PhysRevC.71.069902©2005 American Physical Society
Cu gap-fill is enhanced by replacing the conventional Ta liner with a Co in 22 nm width interconnect structure. The improvement seen at line-end area attributed to better resputtered seed profile, which thicker and exhibits no agglomeration compared that on liner. mechanism of offering coverage than was further studied determined be associated its wetting higher sticking coefficient during resputtering process. Similar performance also demonstrated reflow initial highly conformal profile...
Electromigration and resistivity of Cu, Co Ru on-chip interconnections have been investigated. Non-linered interconnects can better interconnect resistance than if the Cu liner cannot be scaled down below 2 nm in future technologies. A similar size effect increase was observed Co, Ru. Multi-level or back-end-of-line were fabricated using 7 10 node technology wafer processing steps. EM 18 to 88 wide lines, 18-24 with a thin cap 24 lines tested. The electromigration activation energies for...
We have measured the proton recoil polarization in $^{4}\mathrm{H}\mathrm{e}(\stackrel{\ensuremath{\rightarrow}}{e}\text{ },{e}^{\ensuremath{'}}\stackrel{\ensuremath{\rightarrow}}{p})^{4}\mathrm{H}$ reaction at ${Q}^{2}=0.5$, 1.0, 1.6, and $2.6\text{ }(\mathrm{G}\mathrm{e}\mathrm{V}/c{)}^{2}$. The ratio of transfer coefficients differs from a fully relativistic calculation, favoring inclusion medium modification form factors predicted by quark-meson coupling model. In addition, induced...
High-precision 1H(e,e'p)pi(0) measurements at Q2 = 0.126 (GeV/c)2 are reported, which allow the determination of quadrupole amplitudes in gamma*N-->Delta transition; they simultaneously test reliability electroproduction models. The derived quadrupole-to-dipole ( I 3/2) amplitude ratios, R(SM) (-6.5+/-0.2(stat+sys)+/-2.5(mod))% and R(EM) (-2.1+/-0.2(stat+sys)+/-2.0(mod))%, dominated by model error. Previous results should be reconsidered after uncertainties associated with method their...
We report values for the neutron electric to magnetic form factor ratio, ${G}_{\mathit{En}}/{G}_{\mathit{Mn}}$, deduced from measurements of neutron's recoil polarization in quasielastic $^{2}\mathrm{H}$$(\stackrel{\ensuremath{\rightarrow}}{e},{e}^{'}\stackrel{\ensuremath{\rightarrow}}{n})$$^{1}\mathrm{H}$ reaction, at three ${Q}^{2}$ 0.45, 1.13, and 1.45 (GeV/c)${}^{2}$. The data ${Q}^{2}=1.13$ (GeV/c)${}^{2}$ are first direct experimental ${G}_{\mathit{En}}$ employing degrees freedom...