A5111685338- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Mass Spectrometry Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Nuclear physics research studies
- Analytical chemistry methods development
- Plasma Diagnostics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- Particle accelerators and beam dynamics
- Mercury impact and mitigation studies
- Cultural Heritage Materials Analysis
- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Diamond and Carbon-based Materials Research
- Quantum optics and atomic interactions
- Dust and Plasma Wave Phenomena
- Laser Design and Applications
- Radioactive element chemistry and processing
- Plasma Applications and Diagnostics
Northwest Normal University
2016-2025
Chinese Academy of International Trade and Economic Cooperation
2022-2024
Chinese Academy of Sciences
2013-2022
Institute of Modern Physics
2010-2022
Lanzhou City University
2018-2021
China West Normal University
2013
University of Kassel
2000-2003
Institute of Physics, Academia Sinica
1995
We demonstrate that the $4{f}^{14}6s6p\phantom{\rule{0.16em}{0ex}}(^{3}P_{2})\ensuremath{-}4{f}^{13}5d6{s}^{2}\phantom{\rule{0.16em}{0ex}}(^{3}P_{2}^{*})$ transition in neutral ytterbium (Yb) can serve as an additional clock with highest fine-structure constant (${\ensuremath{\alpha}}_{e}$) varying sensitivity coefficient $[q=\ensuremath{-}46165(3000)]$. a scheme to attain simultaneous magic trapping conditions for this other two proposed transitions...
Detailed calculations have been carried out for the direct electron-impact excitation and resonant cross sections from ground state to individual magnetic sublevels of ${(2{p}_{3∕2}^{\ensuremath{-}1}3{s}_{1∕2})}_{2}$ highly charged ions neonlike barium by using a fully relativistic distorted-wave method. The contributions excitations linear polarization quadrupole $(M2)$ line $[{(2{p}_{3∕2}^{\ensuremath{-}1}3{s}_{1∕2})}_{2}\text{\ensuremath{-}}2{p}^{6}\phantom{\rule{0.2em}{0ex}}^{1}S_{0}]$...
Electron-impact excitation cross sections from the ground state to individual magnetic sublevels of excited $1s2{s}^{2}2{p}_{1/2}J=1$ for highly charged berylliumlike ions have been calculated by using a fully relativistic distorted-wave (RDW) method. The degrees linear polarization corresponding radiations are obtained. It is found that Breit interaction makes decrease, and this character becomes more evident with increasing incident electron energy. For given energy in threshold units,...
Low-charged tungsten ions are essential for edge plasma diagnostics in large fusion devices, but their study has been limited due to the complex electronic structure associated with open 4f orbitals. In this work, we investigate visible spectrum emission of W9+ion obtained by electron beam ion trap (EBIT) device, energy set below ionization threshold W8+ ions. Transition wavelengths and partial levels W9+ were calculated using Dirac-Fock-Slater (DFS) method, showing strong agreement...
Abstract The transition energies of 1 S 2 1/2 → p P 1/2,3/2 in Li-like Th 87+ ions were calculated by combining the multi-configuration Dirac-Hartree-Fock (MCDHF) method with model-quantum electrodynamics (model-QED) approach. effects electron correlation, Breit interaction, and QED analyzed detail. Then, isotope shifts, including mass shifts field using two different methods, that is MCDHF finite-field method. results show these methods are excellent agreement.
Multiconfiguration Dirac−Fock (MCDF) method was employed to calculate the first five ionization potentials, electron affinities, resonance excitation energies, oscillator strengths, and radii for element Uus its homologue At. Main valence correlation effects were taken into account. The Breit interaction QED also estimated. uncertainties of calculated IPs, EAs, IR At reduced through an extrapolation procedure. good consistency with available experimental other theoretical values demonstrates...
An atmospheric pressure plasma jet is generated by dual sinusoidal wave (50 kHz and 2 MHz). The dual-frequency exhibits the advantages of both low frequency radio plasmas, namely, long plume high electron density. ignition voltage can be reduced significantly using excitation compared to conventional without aid source. A larger operating range α mode discharge obtained which important obtain homogeneous low-temperature plasma. controllable gas temperature could also excitation.
Abstract The Land é g factors of Ba + are very important in high-precision measurement physics. wave functions, energy levels, and for the 6 s 2 S 1/2 5 d D 3/2,5/2 states ions were calculated using multi-configuration Dirac-Hartree-Fock (MCDHF) method Model-QED method. contributions electron correlation effects quantum electrodynamics (QED) discussed detail. transition energies excellent agreement with experimental results, differences approximately cm -1 . presently factor 2.0024905(16)...
To evaluate the radiative electron capture for collisions of ${\text{U}}^{89+}$ ion with ${\text{N}}_{2}$, recombination cross sections and corresponding emitted photon energies are calculated from ground state $1{s}^{2}2s$ to $1{s}^{2}2sn{l}_{j}\phantom{\rule{0.3em}{0ex}}(2\ensuremath{\le}n\ensuremath{\le}9,0\ensuremath{\le}l\ensuremath{\le}6)$ using newly developed relativistic program RERR06 based on multiconfiguration Dirac-Fock method. The x-ray spectra in collision have been obtained...
Longitudinally-polarized-electron-impact excitation cross sections from the ground state to individual magnetic sublevels of excited $1s2{s}^{2}2{p}_{3/2}$($J = 2$) highly charged Be-like ions are calculated using a fully relativistic distorted-wave method. The contributions Breit interaction and circular polarizations 2$)$\ensuremath{\rightarrow}1{s}^{2}2{s}^{2}$($J 0$) quadrupole (M2) line for selected ${\mathrm{Ag}}^{43+}$, ${\mathrm{Ho}}^{63+}$, ${\mathrm{Bi}}^{79+}$ investigated...
Two Q-switched Nd:YAG lasers at 1064 nm wavelength have been employed to produce plasmas on aluminum-based alloy in single- and collinear double-pulse laser induced breakdown spectroscopy (LIBS). Time resolved technique was used for detecting emission signal by spectrometer equipped with ICCD detector. The intensity calibration of spectral response performed using deuterium tungsten halogen lamps. evolution the plasma temperature electron number density investigated experiments. Based...
A fully relativistic distorted-wave program is developed based on the Grasp92 and Ratip packages to calculate electron impact excitation (EIE) cross sections. As a first application of program, EIE sections Be-like C2+ ions from metastable 1s22s2p3P 1s22p2 3P inner-shell excitations are calculated systematically. Meanwhile, correlation effects target states discussed. It found that play an important role in low energy An excellent agreement when results compared with previous calculations...
In the framework of multiconfiguration Dirac-Hartree-Fock method, we investigate transition properties four excited states in $2{p}^{5}3s$ configuration neutral neon. The electron correlation effects are taken into account systematically by using active space approach. effect higher-order on fine structures is shown. We also study influence Breit interaction and find that it reduces oscillator strength...