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Your search keyword '"Zhang, Denghong"' showing total 10 results
Start Over Author "Zhang, Denghong" Publication Year Range Last 10 years Publisher iop publishing
10 results on '"Zhang, Denghong"'

5. Collisional-radiative modeling for the EUV spectrum of W 40+ -W 42+ ions.

Author

Lei, Lirong, Ding, Xiaobin, Wu, Cunqiang, Zhang, Denghong, Zhang, Ling, Zhang, Fengling, Yao, Ke, Yang, Yang, Fu, Yunqing, and Dong, Chenzhong

Subjects
ION recombination, PLASMA temperature, PLASMA density, ELECTRON density, IONS, PLASMA diagnostics
Abstract

The wavelengths and transition rates of W40+-W42+ ions within the range of 40–140 Å, have been calculated using the Flexible Atomic Code of the Dirac-Fock-Slater method with a central potential. We investigated the charge state distribution of W38+-W45+ ions at different temperatures by constructing an appropriate rate equation and demonstrate the importance of the dielectronic recombination process. Additionally, we simulated the emission spectra of W40+-W42+ ions in a Tokamak plasma environment using collisional-radiative modeling. Our findings demonstrate strong agreement with experimental results and other related theoretical investigations. Finally, we propose certain pairs of transition lines as diagnostic tools for plasma temperature and density, leveraging the correlation between line intensity ratio and electron temperature and density. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Isotope shift of the 2s 2S1/2 → 2p 2P1/2,3/2 transitions of Li-like Ca ions.

Author

Zhang, Denghong, Zhang, Fangjun, Ding, Xiaobin, and Dong, Chenzhong

Subjects
*ISOTOPE shift, *VACUUM polarization, *IONS
Abstract

The mass- and field-shift parameters of the two 2s 2S1/2 → 2p 2P1/2,3/2 transitions in the Li-like Ca ions are calculated by using multi-configuration Dirac–Hartree–Fock (MCDHF) and the relativistic configuration interaction (RCI) methods with the inclusion of the transverse photon (Breit) interaction, vacuum polarization and self-energy corrections. In addition, the mass shift and field shift of these two transitions are calculated, where the field shift is calculated by using the evaluated value δ〈 r2〉 obtained by [Atomic Data and Nuclear Data Tables 99 69 (2013)]. It is found that the mass shift of Li-like Ca ions is greater than the field shift. [ABSTRACT FROM AUTHOR]

Published
2021
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