摘要
This paper reports the results of spectral measurements and a theoretical analysis of the temporal and spatial evolution of laser-produced Cu plasma in vacuum in the range of 8–14 nm.The time dependence of the extreme ultraviolet band spectrum at different positions near the target surface was obtained and found to be dominated by three broad-band features.The 3p and 3d excitations of Cu5+–Cu9+ions were calculated using the Hartree–Fock theory with configuration interactions.The characteristics of the spectral line distribution for the 3p–nd and 3d–nf transition arrays were analyzed.Based on the steady-state collisional radiation model and the normalized Boltzmann distribution,the complex spectral structure in the band of 13–14 nm is accurately explained through consistency comparisons and benchmarking between the experimental and theoretical simulation spectra,demonstrating that the structure mainly stems from the overlapping contribution of the 3d–4f and 3p–3d transition arrays for the Cu5+–Cu9+ions.These results may help in studying the radiation characteristics of isoelectronic series highly-charged ions involving the 3d excitation process.
作者
李麦娟
苏茂根
李昊阳
敏琦
曹世权
孙对兄
张登红
董晨钟
Maijuan LI;Maogen SU;Haoyang LI;Qi MIN;Shiquan CAO;Duixiong SUN;Denghong ZHANG;Chenzhong DONG(Key Laboratory of Atomic and Molecular Physics&Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,People’s Republic of China;Gansu International Scientific and Technological Cooperation Base of Laser Plasma Spectroscopy,Lanzhou 730070,People’s Republic of China)
基金
supported by National Natural Science Foundation of China(Nos.12064040,11874051,11904293,11864036)
the Science and Technology Project of Gansu Province(Nos.21JR7RA122,20JR5RA530)
the Funds for Innovative Fundamental Research Group Project of Gansu Province(No.20JR5RA541)。
