A5006411211- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Gas Dynamics and Kinetic Theory
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Radiation Detection and Scintillator Technologies
- Astronomy and Astrophysical Research
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Combustion and Detonation Processes
- Analytical Chemistry and Sensors
- Astro and Planetary Science
- Material Dynamics and Properties
- Ion-surface interactions and analysis
- Spectroscopy and Quantum Chemical Studies
- Optical and Acousto-Optic Technologies
- Pulsars and Gravitational Waves Research
- Theoretical and Computational Physics
- Combustion and flame dynamics
- Quantum, superfluid, helium dynamics
Nanjing University
2024
State University of New York
1969-1976
Stony Brook University
1969-1976
Abstract The Einstein Probe (EP) achieved its first detection and localization of a bright X-ray flare, EP240219a, on 2024 February 19, during commissioning phase. Subsequent targeted searches triggered by the EP240219a alert identified faint, untriggered gamma-ray burst (GRB) in archived data Fermi Gamma-ray Burst Monitor (GBM), Swift Alert Telescope (BAT), Insight-HXMT/HE. EP Wide-field (WXT) light curve reveals long duration approximately 160 s with slow decay, whereas Fermi/GBM shows...
Abstract Sun-as-a-star spectroscopic characteristics of solar flares can be used as a benchmark for the detection and analysis stellar flares. Here, we study properties an X1.0 flare, using high-resolution data obtained by Chinese H α Solar Explorer (CHASE). A noise reduction algorithm based on discrete Fourier transformation is first employed to enhance signal-to-noise ratio space-integral spectrum, with focus its typical characteristics. For flare interest, find that average profile...
We have measured the light scattering profiles of CO2, N2, C2F6, and C2H6 at 29 °C in both kinetic hydrodynamic regimes. The generalized theory by Weinberg, Kapral, Desai was applied for first time, we believe, to analyze power spectra C2F6 C2H6, which Mountain inadequate. also observed rotational relaxation times vibrational time latter.
The angular and the spectral distribution of scattered light intensity hydrodynamic shear viscosity from polystyrene (Mn = 1.96×105, Mw/Mn < 1.02) in cyclohexane were measured at critical solution concentration above consolute temperature one phase region. In comparing linewidth, correlation length, data with modified mode−mode coupling theory Kawasaki, we note that magnitude a ’’scaled linewidth’’ Γ+ (≡6πη*pΓ/kBTK3) as function Kξ is factor 1.5−3 higher than single universal curve...
The detailed design and performance of a zero-crossing signal averaging scheme for Fabry–Perot (FP) interferometry, which has been successfully applied to the study Rayleigh–Brillouin scattering gases, are presented. system, locks start each scan multichannel scaler (MCS) laser frequency, assigns definite frequency channel MCS, can be adapted any piezoelectrically scanned FP interferometer. It variable rate permitting magnification spectrum over regions interest also provides sample pulses...
Measurements of Rayleigh–Brillouin spectra gaseous mixtures helium–krypton and argon–krypton have been performed over a range concentrations temperatures. The data compared successfully with the theoretical using approximate equation Cohen, Sutherland, Deutch. We considered, for first time, effects temperature changes upon also employed analytical expressions Kestin et al. to determine thermodynamic constants our mixtures.
Sun-as-a-star spectroscopic characteristics of solar flares can be used as a benchmark for the detection and analyses stellar flares. Here, we study properties an X1.0 flare using high-resolution data obtained by Chinese $\mathrm{H} \alpha$ Solar Explorer (CHASE). A noise reduction algorithm based on discrete Fourier transformation is first employed to enhance signal-to-noise ratio space-integral spectrum with focus its typical characteristics. For interest, find that average profile...
The Einstein Probe (EP) achieved its first detection and localization of a bright X-ray flare, EP240219a, on February 19, 2024, during commissioning phase. Subsequent targeted searches triggered by the EP240219a alert identified faint, untriggered gamma-ray burst (GRB) in archived data Fermi/GBM, Swift/BAT, Insight-HXMT/HE INTEGRAL/SPI-ACS. EP/WXT light curve reveals long duration approximately 160 seconds with slow decay, whereas Fermi/GBM shows total 70 seconds. peak occurs slightly later...
Abstract Local regions on the surface of a sample ZnO: Zn phosphor powder were deteriorated by low energy heavy ions to depth few hundred Angstrom units. These behave as ‘thin films’ in which negligible small amount light is produced when an energetic projectile passes through it. The was then scanned across ion beams. scintillation response diminished beam impinged onto film. decrease, ΔL, intensity region whose thickness equivalent film thickness. For 1H and 4He luminescent efficiency,...