A5023162083- Atomic and Molecular Physics
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Ionosphere and magnetosphere dynamics
- Nuclear physics research studies
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Radiation Therapy and Dosimetry
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Plasma Diagnostics and Applications
- Supercapacitor Materials and Fabrication
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Earthquake Detection and Analysis
- Dark Matter and Cosmic Phenomena
- Advancements in Battery Materials
- Astro and Planetary Science
- Particle accelerators and beam dynamics
- Mass Spectrometry Techniques and Applications
- Particle physics theoretical and experimental studies
University of Chinese Academy of Sciences
2011-2025
Institute of Modern Physics
2013-2025
Chinese Academy of Sciences
2011-2024
California State University, Fresno
2024
Peking University
1982-2022
State Key Laboratory of Nuclear Physics and Technology
2013-2022
Intelligent Health (United Kingdom)
2022
Stanford University
2022
RIKEN Nishina Center
2020-2021
Shanghai University of Engineering Science
2017-2018
A long-standing question in nuclear physics is whether chargeless systems can exist. To our knowledge, only neutron stars represent near-pure systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron has been an ongoing quest several decades1, with a particular focus on four-neutron system called tetraneutron, resulting few indications of its existence so far2-4, leaving tetraneutron elusive six...
When a solar wind dynamic pressure impulse impinges on the magnetophere, ultra‐low‐frequency (ULF) waves can be excited in magnetosphere and energy transported from interplanetary space into inner magnetosphere. In this paper, we have systematically studied ULF at geosynchronous orbit by both positive negative pulses. We identified 270 events pulses 254 1 January 2001 to 31 March 2009. found that poloidal toroidal oscillate similar manner of phase near 06:00 local time (LT) 18:00 LT, but...
On 3 September 2009, the Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellites observed a significant intensification chorus in response to interplanetary shock Earth's dayside plasma trough. We analyze wave‐particle interaction reveal that can be caused by gyroresonance between energetic electrons. When electrons are scattered from resonance points low‐density regions along diffusion curves, part their energy lost then transferred amplify chorus. During...
Interplanetary (IP) shocks can greatly disturb the Earth's magnetosphere, causing global dynamic changes in electromagnetic fields and plasma. In order to investigate this, we have systematically analyzed 106 IP shock events based on OMNI data, GOES, Los Alamos National Laboratory satellite observations during 1997−2007. It is revealed that median value of IMF B z keeps negative/positive prior arrival becomes more following arrival. The statistical analysis shows with southward...
The violation of mirror symmetry in the weak force provides a powerful tool to study internal structure proton. Experimental results have been obtained that address role strange quarks generating nuclear magnetism. measurement reported here an unambiguous constraint on quark contributions proton's magnetic moment through electron-proton interaction. We also report evidence for existence parity-violating electromagnetic effect known as anapole is not yet well understood theoretically, but it...
We report a new measurement of the parity-violating asymmetry in elastic electron scattering from proton at backward angles. This is sensitive to strange magnetic form factor as well electroweak axial radiative corrections. The A = -4.92+/-0.61+/-0.73 ppm provides significant constraint on these quantities. implications for are discussed context theoretical estimates
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
[1] During the period 19–22 November 2007, near-equatorial satellites THEMIS D (ThD) and E (ThE) traversed Earth's morningside magnetosphere once per day for nearly 2 h orbits tracked close to each other, providing an excellent opportunity investigate evolution of energetic electrons fluxes (EEFs) on two time scales. By analyzing in energy range 100–300 keV, we have found that EEFs undergo different evolutions subregions during a moderate storm. The at three specific locations, showing,...
In this study, we report in situ observations on the simultaneous periodic modulations drifting energetic electrons (∼100 keV) and bouncing thermal ion species (O + at ∼4.5 keV H ∼280 eV) with same frequency of 3.3 mHz during storm recovery phase 21 October 2001. The Cluster fleet was traveling outbound inner magnetosphere from Southern to Northern Hemisphere morning sector (0900 MLT). ultra‐low‐frequency (ULF) waves magnetic field electric measurements show a mixture several dominant wave...
We report the first measurement of vector analyzing power in inclusive transversely polarized elastic electron-proton scattering at Q2=0.1(GeV/c)2 and large angles. This quantity must vanish single virtual photon exchange, plane-wave impulse approximation for this reaction, can therefore provide information on two exchange amplitudes electromagnetic interactions with hadronic systems. The observable we have measured is driven by imaginary part amplitude, side which simply Compton amplitude...
[1] The modulations of the outer ring current O+ ion fluxes by ULF Pc5 waves are investigated multisatellite observations during storm times. ions have energies up to tens keV. We concentrate on process in terms drift-bounce resonance with standing understand whether could be accelerated/decelerated waves. Two case studies performed, which Cluster satellites travel region morning sector radial distances about 5.5 RE. Distinct flux oscillations observed associated fundamental mode On 25...
[1] We present the first systematic observational study on pitch angle evolutions of O+ ions associated with ULF Pc5 poloidal standing waves excited during geomagnetic storms. The ion measurements are made board CLUSTER satellites Composition Distribution Function (CODIF) instrument, which covers energies from 1 to 40 keV, a low-energy portion ring current. find that nature flux oscillation strongly depends magnetic latitude observation. Near equator, appears only around 0° and 180° angles...
We report coordinated observations of a density trough within the plasmasphere using measurements from radio plasma imager (RPI) and extreme ultraviolet (EUV) on IMAGE satellite DMSP F‐15. The inside with width ∼0.7 R E in terms L shell (from ∼ 2.3 to 3.0) was observed situ by RPI when traversed ∼2130 magnetic local time (MLT) sector. images taken EUV instrument confirm that is plasmasphere. A 2‐D electron image constructed active sounding reveals extends along field orbit at least 41°...
It took about 12 h for the Imager Magnetopause‐to‐Aurora Global Exploration (IMAGE) satellite to fly from outbound pass inbound of every inner magnetosphere crossing. This provides a unique opportunity study nightside‐to‐dayside evolution corotating when is in nighttime while daytime because flux tube observed on nightside may be again dayside such situation. The differences between two observations caused by tube. By analyzing both passive and active sounding measurements IMAGE Radio Plasma...
Pain signals are relayed to the brain via a nociceptive system, and in rare cases, this system contains genetic variants that can limit pain response. Here, we questioned whether human transient receptor potential vanilloid 1 (TRPV1) missense variant causes resistance noxious stimuli and, further, could target region with cell-permeable peptide as therapeutic. Initially using computational approach, identified K710N TRPV1 an otherwise highly conserved of mammalian TRPV1. After generating...
We have measured dissociative recombination of HCl+ with electrons using a merged beams configuration at the heavy-ion storage ring TSR located Max Planck Institute for Nuclear Physics in Heidelberg, Germany. present absolute rate coefficient collision energies from 0 to 4.5 eV. also developed new method deriving cross section measurements. Our approach does not suffer approximations made by previously used methods. The was transformed plasma electron temperature range T=10 5000 K. show that...