A systematic study on 2p → 3d radiative opacity of lowly charged Cu plasmas
Wenhang Yu,
Fengtao Jin,
Yong Hou,
Cheng Gao,
Jianhua Wu,
Jiaolong Zeng,
Jianmin Yuan
Affiliations
Wenhang Yu
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Fengtao Jin
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Yong Hou
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Cheng Gao
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Jianhua Wu
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Jiaolong Zeng
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
Jianmin Yuan
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China
The L-shell radiative opacity of lowly charged Cu plasmas is investigated using a detailed level accounting method. The transmission spectra are compared with a recent experiment at ∼16 eV and 0.005 g/cm3, and good agreement is observed. For a systematic study, radiative opacities caused by 2p → 3d transitions at temperatures of 10–35 eV and densities of 0.001–0.1 g/cm3 are calculated. The dominant ionization stages are lowly charged ones with an open M-shell at such plasma conditions. The result shows that charge state distribution and radiative opacities are very sensitive to temperature. The two strongest absorption peaks of 2p3/2 → 3d5/2 and 2p1/2 → 3d3/2 caused by relativistic orbital splitting are well separated at temperatures lower than 25 eV, whereas they are mixed together to form a broadband structure at higher temperatures.
