A5069687975- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Muscle activation and electromyography studies
- Nuclear reactor physics and engineering
- Prosthetics and Rehabilitation Robotics
- X-ray Spectroscopy and Fluorescence Analysis
- Stroke Rehabilitation and Recovery
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Lower Extremity Biomechanics and Pathologies
- Balance, Gait, and Falls Prevention
- Italian Fascism and Post-war Society
- Diabetic Foot Ulcer Assessment and Management
- Motor Control and Adaptation
- Congenital Heart Disease Studies
- Nuclear Materials and Properties
- Cerebral Palsy and Movement Disorders
- Spinal Cord Injury Research
- Mass Spectrometry Techniques and Applications
- Quantum, superfluid, helium dynamics
University of Delaware
2017-2024
Henry M. Jackson Foundation
2024
Joint Base San Antonio
2024
Brooke Army Medical Center
2024
Cork University Hospital
2022-2023
Wollongong Hospital
2009-2021
John Wiley & Sons (United States)
2020
Rotunda Hospital
2019
Moss Rehabilitation Hospital
2015-2017
Stony Brook University
1994-2008
We have measured the proton elliptic flow excitation function for Au+Au system spanning beam energy range (2–8)AGeV. The shows a transition from negative to positive at energy, Etr∼4AGeV. Detailed comparisons with calculations relativistic Boltzmann equation are presented. suggest softening of nuclear state stiff form ( K∼380MeV) low energies Ebeam≤2AGeV) softer K∼210MeV) higher Ebeam≥4AGeV) where calculated baryon density ρ∼4ρ0.Received 21 September...
Using a relativistic hadron transport model, we investigate the utility of elliptic flow excitation function as probe for stiffness nuclear matter and onset possible quark-gluon-plasma phase transition at alternating-gradient synchrotron energies $1\ensuremath{\lesssim}{E}_{\mathrm{beam}}\ensuremath{\lesssim}11A\mathrm{GeV}$. The shows strong dependence on equation state, exhibits characteristic signatures which could signal transition.
Momentum spectra of charged pions over nearly full rapidity coverage from target to beam have been extracted $0\ensuremath{-}5%$ most central $\text{Au}+\text{Au}$ collisions in the energy range $2A$ $8A\phantom{\rule{0.3em}{0ex}}\text{GeV}$ by E895 experiment. Using a thermal parametrization fit transverse mass spectra, density distributions are extracted. The observed compared with predictions RQMD version 2.3 cascade model and also including longitudinal flow. total $4\ensuremath{\pi}$...
Using the large acceptance Time Projection Chamber of experiment E895 at Brookhaven, measurements collective sideward flow in Au+Au collisions beam energies 2A, 4A, 6A, and 8A GeV are presented form in-plane transverse momentum <p(x)> first Fourier coefficient azimuthal anisotropy v(1). These indicate a smooth variation as function energy. The data compared with four nuclear transport models which have an orientation towards this energy range. All exhibit some qualitative trends similar to...
Rapidity distributions of protons from central ${}^{197}\mathrm{Au}{+}^{197}\mathrm{Au}$ collisions measured by the E895 Collaboration in energy range $(2--8)A\mathrm{GeV}$ at Brookhaven AGS are presented. Longitudinal flow parameters derived using a thermal model including collective longitudinal expansion extracted these distributions. The results show an approximately linear increase velocity, $〈\ensuremath{\beta}\ensuremath{\gamma}{〉}_{L}$, as function logarithm beam energy.
The mechanism of the reaction $^{27}\mathrm{Al}(^{16}\mathrm{O}, ^{12}\mathrm{C}\ensuremath{\alpha})^{27}\mathrm{Al}$ at 65.6-MeV incident energy has been examined with use coincidence techniques. It is shown that broad bell-shaped peak observed in $^{12}\mathrm{C}$ singles spectra corresponds to an $\ensuremath{\alpha}$-transfer-like process leading fixed excitation $\ensuremath{\alpha}$+$^{27}\mathrm{Al}$ system. $\ensuremath{\alpha}$-$^{12}\mathrm{C}$ angular correlation, however,...
Charged particles from four sets of reactions induced by ${\mathrm{Li}}^{6}$, ${\mathrm{Li}}^{7}$ on ${\mathrm{B}}^{10}$, ${\mathrm{B}}^{11}$ targets have been observed. The incident beam energy in each case corresponds to 3.05 MeV the center-of-mass system. A $\frac{\mathrm{dE}}{\mathrm{dx}}$, $E$ counter coupled an on-line computer is used obtain 115 angular distributions and absolute cross sections $p$, $d$, $t$, ${\mathrm{He}}^{3}$, ${\mathrm{He}}^{4}$ particles. ${\mathrm{N}}^{14}$,...
Low-lying $T=\frac{3}{2}$ levels of the mass-21 isospin quartet ($^{21}\mathrm{F}$, $^{21}\mathrm{Ne}$, $^{21}\mathrm{Na}$, and $^{21}\mathrm{Mg}$) three members mass-37 ($^{37}\mathrm{Ar}$, $^{37}\mathrm{K}$, $^{37}\mathrm{Ca}$) have been investigated. An improved particle-identification system which employs two transmission ($\ensuremath{\Delta}E$) detectors one stopping ($E$) detector permits measurement low-yield nuclear reactions was used to determine masses...
The particle decay of the ground state $^{6}\mathrm{Be}$ was observed following population in $^{6}\mathrm{Li}(^{3}\mathrm{He}, t)^{6}\mathrm{Be}$ reaction. $\ensuremath{\alpha}$ spectrum corresponds to ordinary three body phase space shape for energies above about 100 keV center-of-mass system. At lower relative yield exceeds available space. It is shown that neither modified by proton-proton final interaction nor corresponding sequential through $^{5}\mathrm{Li}$ have shapes consistent...
Robot-assisted training is a promising tool under development for improving walking function based on repetitive goal-oriented task practice. The challenges in developing the controllers gait devices that promote desired changes complicated by limited understanding of human response to robotic input. A possible method controller formulation can be principle bio-inspiration, where robot controlled apply change joint moment applied subjects when they achieve feature interest. However, it...
We present the first excitation function of pi(-) intensity interferometry at Alternating Gradient Synchrotron (AGS) energies (2-8 A GeV). The sensitivity multidimensional correlation functions to geometry and dynamics pion-emitting system provides a stringent test transport models heavy ion collisions. Detailed comparisons with realistic model, both without an explicit nuclear mean field, suggest that beam energy evolution in reaction is different model than data. significantly increased...
Evaporation residue excitation functions and \ensuremath{\alpha}-multiplicities from complete fusion of $^{16}\mathrm{O}$ with $^{197}\mathrm{Au}$ $^{208}\mathrm{Pb}$ have been measured the threshold up to 140 MeV incident energy. The data allow conclusion that strongly overdamped motion cannot be dominant at energies in vicinity barrier below ${\mathit{E}}^{\mathrm{*}}$\ensuremath{\approxeq}50 MeV. At above 50 cross section for $^{16}\mathrm{O}$${+}^{208}$Pb is much greater than predicted...
Particle-particle correlations (p-p and \ensuremath{\alpha}-\ensuremath{\alpha}) vs relative momentum (${P}_{\mathrm{rel}}$) are reported (${\ensuremath{\theta}}_{\mathrm{lab}\mathrm{\ensuremath{\approxeq}}19.5}$\ifmmode^\circ\else\textdegree\fi{}) for the reaction 140 MeV $^{16}$O${+}^{27}$Al. A plot of Galilean invariant cross section indicates that evaporative emission dominates gross proton production even at this forward angle. The observed anticorrelation between two protons small...
The ($^{3}\mathrm{He},d$), reaction cross sections on $^{90,92,94}\mathrm{Zr}$ and $^{92,94,96,98}\mathrm{Mo}$ targets have been measured to unbound isobaric analog states. All expected transitions are observed except those $3{s}_{\frac{1}{2}}$ states which inhibited. Distorted-wave Born approximation calculations do not explain the anomaly. Other possible explanations suggested.
The yield for the multistrange Xi(-) hyperon has been measured in 6A GeV Au+Au collisions via reconstruction of its decay products pi(-) and Lambda, latter also being reconstructed from daughter tracks p. measurement is rather close to threshold production therefore provides an important test model predictions. Lambda are compared several centralities. In central found be excellent agreement with statistical transport predictions, suggesting that hadron approaches chemical equilibrium high...
We present data for small-angle particle-particle correlations from the reactions 80, 140, 215, and 250 MeV $^{16}\mathrm{O}$${+}^{27}$Al\ensuremath{\rightarrow}p-p or p-d. The main features of these are anticorrelations small relative momenta (\ensuremath{\le}25 MeV/c) that strengthen with increasing bombarding energy. Statistical model calculations have been performed to predict mean lifetimes each step evaporative decay, then simulate trajectories particle pairs resulting correlations....
An analysis of inclusive pion production in proton-beryllium collisions at 6.4, 12.3, and 17.5 GeV/$c$ proton beam momentum has been performed. The data were taken by Experiment 910 the Alternating Gradient Synchrotron Brookhaven National Laboratory. differential ${\ensuremath{\pi}}^{+}$ ${\ensuremath{\pi}}^{\ensuremath{-}}$ cross sections (${d}^{2}\ensuremath{\sigma}/\mathit{dpd}\ensuremath{\Omega}$) measured up to 400 mrad ${\ensuremath{\theta}}_{\ensuremath{\pi}}$ 6...