Forbidden-line spectroscopy of the ground-state configuration of Cd-like W

Fei, Z.; Li, Wenxian; Grumer, Jon; Shi, Zhongzhi; Zhao, Runze; Brage, Tomas; Huldt, S.; Yao, Ke; Hutton, R.; Zou, Yaming

doi:10.1103/physreva.90.052517

Cited by 36 publications

(70 citation statements)

References 17 publications

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“…All three kinds of electron correlation (VV, CV, and CC) were in effect taken into account since we allow for excitations from all subshells. To investigate the convergence of our approach, we systematically monitor the results while increasing the N space step-by-step, as described in Fei et al [16]. From this we estimate the convergence to be within one part in a million.…”

Section: Correlation Model: Facmentioning

confidence: 99%

“…Grumer et al [16] and Guo et al [31] emphasized the importance of deep-corevalence correlation effects in Ag-like (4d 10 4f ) and Co-like (3p 6 3d 9 ) ions. Karpuškienė et al [32] investigated the contribution of M2 and E3 transitions to the decay of metastable levels belonging to 4p 5 4d N +1 and 4p 6 4d N −1 4f .…”

Section: Introductionmentioning

confidence: 99%

“…Accurate and reliable atomic data on tungsten ions are therefore in high demand, which has initiated a large number of both experimental and theoretical investigations (see e.g. the reviews in [5][6][7][8] and some examples of recent works in [9][10][11][12][13][14][15][16][17][18][19][20]). …”

Section: Introductionmentioning

confidence: 99%

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Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations

Guo¹,

Grumer²,

Brage³

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. Energies, transition rates, line strengths and lifetimes have been computed for all levels of the 4p 6 and 4p 5 4d configurations of W 38+ by using the multiconfiguration Dirac-Hartree-Fock method as well as relativistic many-body perturbation theory. We investigate systematically correlation, relativistic and QED effects on different properties, including excitation energies and transition rates. We demonstrate that it is important to include core-valence correlation of rather deep subshells (including 3d and 3p) to reach close to spectroscopic accuracy for the transition energies. We also show that high multipole transitions (E3, M2) are important for the lifetime of some metastable levels of 4p 5 4d ( 3 F 3 , 1 D 2 , 3 D 2 ). The present results are in good agreement with experiments and of considerable higher accuracy than what has been reached in previous theoretical works.

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Section: Correlation Model: Facmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations

Guo¹,

Grumer²,

Brage³

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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“…The second-order MBPT approach (Lindgren 1974;Safronova et al 1996), implemented by Gu (2005Gu ( , 2006 in FAC has been used successfully to calculate atomic parameters with high accuracy (Gu 2007;Gu et al 2011;Wang et al 2014;Fei et al 2014;Guo et al 2015;Wang et al 2015;Si et al 2015a,b). Here we briefly describe the theory.…”

Section: Mbptmentioning

confidence: 99%

Energy levels and transition rates for helium-like ions withZ = 10–36

Guo

Wang

et al. 2016

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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.

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“…Several of these machines are being used for tungsten spectroscopy complementary to that performed on our facility. This includes measurements at the Berlin [30][31][32], Gaithersburg [33][34][35], Shanghai [36,37] and Tokyo facilities [38].…”

Section: Introductionmentioning

confidence: 99%

Tungsten Data for Current and Future Uses in Fusion and Plasma Science

Beiersdörfer

Clementson

Safronova

2015

Atoms

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We give a brief overview of our recent experimental and theoretical work involving highly charged tungsten ions in high-temperature magnetically confined plasmas. Our work includes X-ray and extreme ultraviolet spectroscopy, state-of-the-art structure calculations, the generation of dielectronic recombination rate coefficients, collisional-radiative spectral modeling and assessments of the atomic data need for X-ray diagnostics monitoring of the parameters of the core plasma of future tokamaks, such as ITER. We give examples of our recent results in these areas.

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Forbidden-line spectroscopy of the ground-state configuration of Cd-like W

Cited by 36 publications

References 17 publications

Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations

Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations

Energy levels and transition rates for helium-like ions withZ = 10–36

Tungsten Data for Current and Future Uses in Fusion and Plasma Science

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Forbidden-line spectroscopy of the ground-state configuration of Cd-like W

Cited by 36 publications

References 17 publications

Energy levels and radiative data for Kr-like W38+from MCDHF and RMBPT calculations

Energy levels and radiative data for Kr-like W38+from MCDHF and RMBPT calculations

Energy levels and transition rates for helium-like ions withZ = 10–36

Tungsten Data for Current and Future Uses in Fusion and Plasma Science

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Product

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Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations

Energy levels and radiative data for Kr-like W³⁸⁺from MCDHF and RMBPT calculations