R. Suleiman
A5102856768- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Solar and Space Plasma Dynamics
- Atmospheric Ozone and Climate
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Stellar, planetary, and galactic studies
- Ionosphere and magnetosphere dynamics
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Astro and Planetary Science
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Atomic and Molecular Physics
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Neutrino Physics Research
- Mercury impact and mitigation studies
- Particle accelerators and beam dynamics
- Advanced Chemical Physics Studies
Center for Astrophysics Harvard & Smithsonian
2015-2025
Smithsonian Astrophysical Observatory
2025
Worcester Polytechnic Institute
2023
Thomas Jefferson National Accelerator Facility
2011-2022
University of Alaska Fairbanks
2022
Massachusetts Institute of Technology
2005-2019
Cadi Ayyad University
2018
Harvard University Press
2016
American University of Beirut
2014
Kent State University
1998-2008
Abstract. This overview paper highlights the successes of Ozone Monitoring Instrument (OMI) on board Aura satellite spanning a period nearly 14 years. Data from OMI has been used in wide range applications and research resulting many new findings. Due to its unprecedented spatial resolution, combination with daily global coverage, plays unique role measuring trace gases important for ozone layer, air quality, climate change. With operational very fast delivery (VFD; direct readout) near...
We present a self-consistent empirical model for several plasma parameters of polar coronal hole near solar minimum, derived from observations with the Solar and Heliospheric Observatory Ultraviolet Coronagraph Spectrometer. The describes radial distribution density electrons, H0, O5 + outflow velocity unresolved most probable velocities H0 during period between 1996 November 1997 April. In this Letter, we compare H I Lyα O VI λλ1032, 1037 emission lines spatial models parameters, iterate...
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,...
Abstract. We present and discuss the Smithsonian Astrophysical Observatory (SAO) formaldehyde (H2CO) retrieval algorithm for Ozone Monitoring Instrument (OMI) which is operational NASA OMI H2CO. The version of described here includes relevant changes with respect to one, including differences in reference spectra H2CO, fit O2–O2 collisional complex, updates high-resolution solar spectrum, use a model sector over remote Pacific Ocean normalize retrievals, an updated air mass factor (AMF)...
Abstract Aircraft and satellite observations indicate the presence of ppt (ppt ≡ pmol/mol) levels BrO in free troposphere with important implications for tropospheric budgets ozone, OH, mercury. We can reproduce these GEOS‐Chem global chemistry model by including a broader consideration multiphase halogen (Br‐Cl) than has been done past. Important reactions regenerating from its nonradical reservoirs include HOBr + Br − /Cl both aerosols clouds, oxidation ClNO 3 ozone. Most is troposphere,...
We present a comprehensive and self-consistent empirical model for several plasma parameters in the extended solar corona above polar coronal hole. The is derived from observations with SOHO Ultraviolet Coronagraph Spectrometer (UVCS/SOHO) during period between 1996 November 1997 April. compare of H I Lyα O VI λλ1032, 1037 emission lines detailed three-dimensional models iterate optimal consistency measured synthesized observable quantities. Empirical constraints are obtained radial...
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...
We report on a measurement of the parity-violating asymmetry in scattering longitudinally polarized electrons unpolarized protons at Q2 0.230 (GeV/c)(2) and angle theta (e) = 30 degrees - 40 degrees. Using large acceptance fast PbF2 calorimeter with solid delta omega 0.62 sr, A4 experiment is first parity violation to count individual events. The measured A(phys)=(-5.44+/-0.54(stat)+/-0.26(sys))x10(-6). standard model expectation assuming no strangeness contributions vector form factors A(0)...
We report on a measurement of the parity violating asymmetry in elastic scattering polarized electrons off unpolarized protons with A4 apparatus at MAMI Mainz four momentum transfer value Q(2)=0.108 (GeV/c)(2) and forward electron angle 30 degrees <theta(e)<40 . The measured is A(LR)(e-->p)=[-1.36+/-0.29(stat)+/-0.13(syst)]x10(-6). expectation from standard model assuming no strangeness contribution to vector current A(0)=(-2.06+/-0.14)x10(-6). have improved statistical accuracy by factor 3...
We have measured the transverse asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering Hall A at Jefferson Laboratory with high precision for ${Q}^{2}$ values from 0.1 to $0.6(\mathrm{GeV}/c{)}^{2}$. The neutron magnetic form factor ${G}_{M}^{n}$ was extracted based on Faddeev calculations ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1$ and...
The imaging Compton telescope COMPTEL aboard NASA's Gamma-Ray Observatory has opened the MeV gamma-ray band as a new window to astronomy. provided first complete all-sky survey in energy range 0.75 30 MeV. catalogue, presented here, is largely restricted published results. It contains firm well marginal detections of continuum and line emitting sources presents upper limits for various types objects. numbers most significant are 32 steady 31 bursters. Among sources, detected so far,...
We use combined Ultraviolet Coronagraph Spectrometer and Large Angle Spectroscopic data to determine the O5+ outflow velocities as a function of height along axis an equatorial streamer at solar minimum latitude (at 2.3 R☉ from Sun center). The results show that increases rather abruptly in region between 3.6 4.1 near cusp gradually ~90 km s-1 ~5 stalk beyond cusp. latitudinal variation shows there is no (within measurement uncertainties) center streamer, called core, steep increase occurs...
We have measured the parity-violating electroweak asymmetry in elastic scattering of polarized electrons from proton. The kinematic point [ $〈{\ensuremath{\theta}}_{\mathrm{lab}}〉\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}12.3\ifmmode^\circ\else\textdegree\fi{}$ and $〈{Q}^{2}〉\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.48(\mathrm{GeV}/c{)}^{2}$] is chosen to provide sensitivity, at a level that theoretical interest, strange electric form factor ${G}_{E}^{s}$. result,...
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
TEMPO was selected in 2012 by NASA as the first Earth Venture Instrument, for launch circa 2018. It will measure atmospheric pollution greater North America from space using ultraviolet and visible spectroscopy. measures Mexico City to Canadian tar sands, Atlantic Pacific, hourly at high spatial resolution (~2 km N/S×4.5 E/W 36.5°N, 100°W). provides a tropospheric measurement suite that includes key elements of air chemistry. Measurements are geostationary (GEO) orbit, capture inherent...
The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 to be A_PV -23.80 +/- 0.78 (stat) 0.36 (syst) parts per million. This result is consistent with zero contribution strange quarks combination electric magnetic form factors G_E^s + 0.517 G_M^s 0.003 0.010 0.004 0.009 (ff), where third error due limits precision on electromagnetic...
We present an assessment study of the Global Ozone Monitoring Experiment 2 (GOME‐2) reflectance for wavelength range 270–350 nm by comparing measurements with simulations calculated using vector linearized discrete ordinate radiative transfer model (VLIDORT) and Microwave Limb Sounder (MLS) ozone profiles. The results indicate wavelength‐ cross‐track‐position‐dependent biases. GOME‐2 is overestimated 10% near 300 15%–20% around 270 nm. Stokes fraction made onboard polarization measurement...
Intensive theoretical and experimental efforts over the past decade have aimed at explaining discrepancy between data for proton electric to magnetic form factor ratio, G(E)/G(M), obtained separately from cross section polarization transfer measurements. One possible explanation this difference is a two-photon-exchange contribution. In an effort search effects beyond one-photon-exchange or Born approximation, we report measurements of observables in elastic H(e[over →],e(')p[over →])...
Over the last five decades, Earth's atmosphere has been extensively monitored from space using different spectral ranges. Early efforts were directed at improving weather forecasts with first meteorological satellites launched in 1960s. Soon thereafter, intersection between weather, climate and atmospheric chemistry led to observation of composition space. During 1970s Nimbus satellite program started regular monitoring ozone integrated columns water vapor profiles Backscatter Ultraviolet...
Spectral line profiles have been measured for H I λ1216, O VI λλ1032, 1037, and Mg X λ625 in a polar coronal hole observed during 1997 September 15-29, at projected heliographic heights ρ between 1.34 2.0 R☉. Observations of λ1216 the doublet from January ρ=1.5-3.0 R☉ are provided comparison. The lines well fit to narrow broad component which appear be associated with regions higher lower spectral radiance, respectively. components dominate low become small fraction heights. is ρ=1.34...
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from deuteron at backward angles Q2=0.038 (GeV/c)2. This quantity provides determination neutral weak axial vector form factor nucleon, which can potentially receive large electroweak corrections. The measured A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. also updated results previous experiment Q2=0.091 (GeV/c)2, are