Energy levels and transition rates for helium-like ions with Z=10-36

doi:10.1051/0004-6361/201628656

CORC > 北京大学 > 工学院

	Energy levels and transition rates for helium-like ions with Z=10-36
	Si, R. ; Guo, X. L. ; Wang, K. ; Li, S. ; Yan, J. ; Chen, C. Y. ; Brage, T. ; Zou, Y. M.
刊名	ASTRONOMY & ASTROPHYSICS
	2016
关键词	atomic data atomic processes X-RAY-EMISSION DIELECTRONIC SATELLITE SPECTRA PERTURBATION-THEORY APPROACH ELECTRON-IMPACT EXCITATION CONFIGURATION-INTERACTION CALCULATIONS LYING RESONANCE STATES MANY-BODY CALCULATIONS SOLAR-FLARE SPECTRA HYDROGEN-LIKE IRON L-SHELL IONS
DOI	10.1051/0004-6361/201628656
英文摘要	Aims. Helium-like ions provide an important X-ray spectral diagnostics in astrophysical and high-temperature fusion plasmas. An interpretation of the observed spectra provides information on temperature, density, and chemical compositions of the plasma. Such an analysis requires information for a wide range of atomic parameters, including energy levels and transition rates. Our aim is to provide a set of accurate energy levels and transition rates for helium-like ions with Z = 10-36. Methods. The second-order many-body perturbation theory (MBPT) was adopted in this paper. To support our MBPT results, we performed an independent calculation using the multiconfiguration Dirac-Hartree-Fock (MCDHF) method. Results. We provide accurate energies for the lowest singly excited 70 levels among 1snl (n <= 6; l <= (n 1)) configurations and the lowest doubly excited 250 levels arising from the K-vacancy 2ln' l' (n' <= 6; l' <= (n' 1)) configurations of helium-like ions with Z = 10 36. Wavelengths, transition rates, oscillator strengths, and line strengths are calculated for the E1, M1, E2, and M2 transitions among these levels. The radiative lifetimes are reported for all the calculated levels. Conclusions. Our MBPT results for singly excited n <= 2 levels show excellent agreement with other elaborate calculations, while those for singly excited n >= 3 and doubly excited levels show significant improvements over previous theoretical results. Our results will be very helpful for astrophysical line identification and plasma diagnostics.; NSAF [11076009]; National Natural Science Foundation of China [11374062]; Chinese Association of Atomic and Molecular Data; Swedish Research Council [2015-04842]; Chinese National Fusion Project for ITER [2015GB117000]; Shanghai Leading Academic Discipline Project [B107]; International Exchange Program Fund for Doctorate Students of Fudan University Graduate School; SCI(E); EI; ARTICLE; tomas.brage@fysik.lu.se; 592
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494471]
专题	工学院
推荐引用方式 GB/T 7714	Si, R.,Guo, X. L.,Wang, K.,et al. Energy levels and transition rates for helium-like ions with Z=10-36[J]. ASTRONOMY & ASTROPHYSICS,2016.
APA	Si, R..,Guo, X. L..,Wang, K..,Li, S..,Yan, J..,...&Zou, Y. M..(2016).Energy levels and transition rates for helium-like ions with Z=10-36.ASTRONOMY & ASTROPHYSICS.
MLA	Si, R.,et al."Energy levels and transition rates for helium-like ions with Z=10-36".ASTRONOMY & ASTROPHYSICS (2016).