A5042245392- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Mass Spectrometry Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Nuclear Physics and Applications
- Nuclear physics research studies
- Ion-surface interactions and analysis
- Particle accelerators and beam dynamics
- Laser-Matter Interactions and Applications
- Calibration and Measurement Techniques
- Radiation Shielding Materials Analysis
- Advanced Frequency and Time Standards
- Neutrino Physics Research
- Insect Resistance and Genetics
- Stellar, planetary, and galactic studies
- Photocathodes and Microchannel Plates
- Insect and Pesticide Research
- Astronomical and nuclear sciences
- Insect Pest Control Strategies
- Engineering Applied Research
- Radioactive Decay and Measurement Techniques
- Superconducting and THz Device Technology
- Laser-Plasma Interactions and Diagnostics
Yangtze University
2025
National University of Defense Technology
2023-2025
Fudan University
2001-2017
Institute of Modern Physics
2001-2017
Ministry of Education of the People's Republic of China
2011-2017
Shanghai Jiao Tong University
1997-2003
Lund University
1997
RIKEN
1993-1995
We present the results of an experimental study magnetic dipole (M1) transitions in highly charged argon ions (Ar X, Ar XI, XIV, XV) visible spectral range using electron beam ion trap. Their wavelengths were determined with, for ions, unprecedented accuracy up to sub-ppm level and compared with theoretical calculations. The QED contributions, calculated this Letter, are found be 4 orders magnitude larger than error absolutely indispensable bring theory experiment a good agreement. This...
Abstract Methoxyfenozide is an insecticide with a unique mode of action on the insect ecdysone receptor and has been registered for control pests all over world. In present work, Spodoptera frugiperda was exposed to sublethal lethal concentrations methoxyfenozide determine its impact specific biological traits, metabolic enzyme activity, expression detoxification enzymes. The result showed that 72-h posttreatment LC50 LC70 significantly reduced fecundity (eggs/female) F0 generation compared...
We report on a high resolution flat crystal spectrometer designed for the Shanghai EBIT. Its energy range is from 0.5 to 10 keV. Three crystals can be installed in vacuum chamber simultaneously, and its effective Bragg angle covered 15 degrees 75 . A version charge-coupled device detector used detection of photons. An under 1 eV was reached measurements 4.5 keV Kalpha(1) line by using an x-ray generator with titanium anode. The also tested operate well EBIT observing lines tungsten at around 3.2
The ionization and dissociation of methane in an intense laser field (approximately 1013 W cm−2) with pulse duration 7 ns were studied experimentally. yields fragment ions are plotted as a function energy. Singly charged CH3+, CH2+, CH+, C+, H+ H2+ observed from 6 to 20 mJ, C2+ when the energy was above 10 mJ. However, CH3+ CH2+ decreased increased 6, whereas remaining singly enhanced. kinetic ions, which corresponds excitation energy, measured. At higher energies pulse, molecule can absorb...
Abstract In this work, α decay and proton emission half-lives are studied by the deformed Gamow-like model, which introduces effects of nucleus deformation. The calculations show that it is necessary to consider deformation in calculation for nuclei far from shell. Moreover, model used predict shell more accurately. indicate our follows Geiger-Nuttall law. Furthermore, study structure, we find number next neutron likely be 152. This work may benefit future research on search superheavy new...
The three Mn I lines at 17325, 17339 and 17349 \AA~are among the 25 strongest ($\log(gf)>0.5$) in H-band. They are all heavily broadened due to hyperfine structure profiles of these have so far not been understood. Earlier studies even suggested that they were blended. In this work, infra-red (IR) studied theoretically compared experimental spectra assist complete understanding solar spectrum IR. It is shown can be described conventional way by diagonal $A$ $B$ interaction constants....
An ultrasoft x-ray and extreme ultraviolet spectrometer built calibrated in the wavelength range of 7–60 Å is reported here. Details alignment this flat field with both a laser telescope are presented. The light path function rather than standard calibration function, i.e. polynomial introduced as fit which gives good agreement design values makes more reliable when extended to region outside points used for calibration, compared function. results Manson source (model 2) targets Cu, Fe Ti...
Abstract In this work, we systematically investigate the two-proton (2 p ) radioactivity assisted by an ultra-intense laser field within a deformed one-parameter model (OPM). The results show that hardly affects preformation probability of emitted 2 -pair, but it can change radioactive half-lives to finite extent affecting penetrability probability. Moreover, compare responses different nuclei field, and is found with low decay width are more easily influenced intense field. Furthermore,...
Projectile K\ensuremath{\alpha} satellite and hypersatellite x-ray yields were measured in collisions of Ar ions with energies 43, 52, 65, 80, 95, 300 MeV targets C, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Y, Nb, Mo, Sn, Nd, Tb, Ho, Ta, W atomic number ${\mathit{Z}}_{\mathit{t}}$=6--74. The intensity ratio to lines is reported as functions the target ${\mathit{Z}}_{\mathit{t}}$ incident energy ${\mathit{E}}_{\mathit{p}}$. vacancy-sharing model was found predict dependence at 43 near symmetric...
In the present work, we investigate excitation rates and population dynamics of $^{229}$Th nuclei induced by inelastic electron scattering, focusing on how energy, flux, ionic charge state influence process nuclei. Using Dirac Hartree-Fock-Slater method, calculate cross sections for both isomeric (8.36 eV) second-excited (29.19 keV) over a wide range states energies. Our results demonstrate that these factors significantly impact nuclear efficiency. The effect indirect through enhancing...
In the present work, we investigate excitation rates and population dynamics of 229Th nuclei induced by inelastic electron scattering, focusing on how energy, flux, ionic charge state influence process nuclei. Using Dirac Hartree-Fock-Slater method, calculate cross sections for both isomeric (8.36 eV) second-excited (29.19 keV) over a wide range states energies. Our results demonstrate that these factors significantly impact nuclear efficiency. The effect indirect through enhancing...
In this paper, the potential of Electron Beam Ion Traps (EBIT) in assisting plasma diagnostics is reviewed. Examples how EBITs have contributed to diagnostic studies, including both magnetic fusion and inertial plasmas, are shown. The progress instrumentation development at Shanghai EBIT ongoing research laboratory reported.
A thin back-illuminated CCD based photon detector system has been installed on the Rowland circle of a 2.2 meter grazing incidence spectrometer, replacing previously used Ceratron single channel detector. For reasons to be described chip surface was not angled tangential spectrometer circle. The is for beam-foil spectroscopy experiments at RIKEN laboratory. performance tested using beam 183 MeV Nb ions.
Photoinduced Ba L x-rays were measured, in the excitation energy range of 5.6-30 keV, by using high-brilliance undulator radiation. The obtained intensity ratios, excitation-energy independent beta(4)/L beta(3), eta/L beta(1), iota/L alpha(1,2), beta(6)/ alpha(1,2) and beta(2,15)/L as well excitation- dependent beta(1)/L beta(3)/L compared with theoretical calculations, which calculations performed applying various subsets subshell fluorescence yields Coster-Kronig yields. Deviations from...
Lifetimes of several 2p3s, 2p3p and 2p3d levels in singly ionized boron, B II, have been determined by means beam–foil spectroscopy theoretical calculations, using the superposition-of-configurations (SOC) program Cowan. These doubly-excited terms which lie close to first ionization limit II make radiative transitions excited system. For a few autoionizing 2p3l we calculated excitation energies decay rates. The experimental data are generally very good agreement.
We have measured the decay time of 1s22p 2P3/2 level Li-like Ar15+ using beam-foil spectroscopy. The experiment was done at a beam energy 2.6 MeV/u and with an Al foil instead C which is usually used in experiments. signal recorded by means CCD detector system installed on 2.2 meter grazing incidence spectrometer. This allowed recording spectral line-profile decay. result shows different times for parts line profile, thereby corroborating our previous studies same transition energy. In...