Wavelengths and transition probabilities for n=4→n′=4 transitions in heavy Cu-like ions (70⩽Z⩽92)

Palmeri, P.; Quinet, Pascal; Biémont, Émile; Trabert, E

doi:10.1016/j.adt.2006.12.003

Cited by 16 publications

(22 citation statements)

References 23 publications

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“…Then, one may anticipate that if the incorrect prediction of the 3C/3D line intensity ratio relates to electron correlation effects, the agreement between theory and experiment will vary with Z, and the deviation will vanish for large Z. Such a trend of the deviation of theoretical (e.g., MCDF) and experimental data as function of Z is commonly observed for transition energies in isoelectronic sequences [3,[33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 96%

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
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We present a theoretical and experimental investigation of the 3d → 2p resonance to intercombination line ratio in low-to mid-Z neonlike ions of astrophysical interest, i.e., of the 2p 1/2 2p 4 3/2 3d 3/2 1 P o 1 → 2p 6 1 S 0 and 2p 2 1/2 2p 3 3/2 3d 5/2 3 D o 1 → 2p 6 1 S 0 transitions commonly labeled 3C and 3D, respectively. In particular, we have employed the configuration interaction method with three different numbers of basis states and the many-body perturbation theory method to calculate oscillator strengths and energies for neonlike ions from Z = 18 to Z = 36. Combining our calculations with a systematic study of previous works in the literature, we show that these methods can predict accurate and converged energies for these transitions. We also find convergence for the oscillator strengths, but the ratio of oscillator strengths, which can be compared to experimental values of the relative intensity ratios of these lines, appears to converge to values higher than measured. We speculate that this is due to the role of electron-electron correlations. While the amount of electron correlations associated with the intercombination line 3D appears to be well described, it seems that the contributions from highly excited states are not sufficiently accounted for in the case of the resonance line 3C. In order to augment the body of available experimental data for neonlike ions, we present a measurement of the 3C and 3D lines in neonlike Ar 8+. We report a wavelength of 41.480 ± 0.001Å for line 3C and 42.005 ± 0.001Å for line 3D. The intensity ratio of the two lines was determined to be I(3C)/I(3D) = 11.32 ± 1.40.

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Section: Introductionmentioning

confidence: 96%

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
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“…Spectra of W 39+ -W 47+ in the 12-20-nm region observed with an electron-beam ion-trap (EBIT) light source were investigated by Ralchenko et al [21]. Wavelengths and transition probabilities for n = 4 → n = 4 transitions in heavy Cu-like ions (70 Z 92) were presented by Palmeri et al [22]. Fully relativistic multiconfiguration Dirac-Fock (MCDF) calculations were carried out.…”

Section: Introductionmentioning

confidence: 99%

Relativistic atomic data for Cu-like tungsten

Safronova

Beiersdörfer

2012

Phys. Rev. A

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Energy levels, radiative transition probabilities, and autoionization rates for [Ne]3s 2 3p 6 3d 9 4l nl, [Ne]3s 2 3p 5 3d 10 4l nl (n = 4-6), and [Ne]3s 2 3p 6 3d 9 5l nl (n = 5-7) states in Cu-like tungsten (W 45+ ) are calculated using the relativistic many-body perturbation theory method (RMBPT code), the multiconfiguration relativistic Hebrew University Lawrence Livermore Atomic Code (HULLAC), and the Hartree-Fock relativistic method (COWAN code). Autoionizing levels above the [Ne]3s 2 3p 6 3d 10 threshold are considered. It is found that configuration mixing among [Ne]3s 2 3p 6 3d 9 4l nl and [Ne]3s 2 3p 5 3d 10 4l nl plays an important role for all atomic characteristics. Branching ratios relative to the first threshold and intensity factors are calculated for satellite lines, and dielectronic recombination (DR) rate coefficients are determined for the singly excited [Ne]3s 2 3p 6 3d 10 nl (n = 5-7) as well as doubly excited, nonautoionizing [Ne]3s 2 3p 6 3d 9 4s4l (l = s,p,d,f ), [Ne]3s 2 3p 6 3d 9 4p4l (l = p,d,f ), [Ne]3s 2 3p 6 3d 9 4d 2 , [Ne]3s 2 3p 5 3d 10 4s4l (l = s,p,d), and [Ne]3s 2 3p 5 3d 10 4p 2 states in Cu-like W 45+ ions. Contributions from the autoionizing doubly excited [Ne]3s 2 3p 6 3d 9 4l nl, [Ne]3s 2 3p 5 3d 10 4l nl, and [Ne]3s 2 3p 6 3d 9 5l nl states (with n up to 500), which are particulary important for calculating total DR rates, are estimated. Synthetic dielectronic satellite spectra from Cu-like W are simulated in a broad spectral range from 3 to 70Å. These calculations provide highly accurate values for a number of W 45+ properties useful for a variety of applications, including fusion applications.

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“…Vilkas and Ishikawa [58] performed calculations within the multireference Møllr-Plesset (MR-MP) formalism; while Träbert et al [59] applied the same approach with a larger basis set. Blundell et al [60] reported results using second-order RMBPT and x [34]; y [12]; z [27]; aa [28] ab [29]; ac [31]; ad [68]; ae [69]; af [72]; ag [25]; ah [33]; ai [70]; aj [71]; ak [35]; al [36]; am [74]; an [75]. later improved their calculations by including frequencydependent, retarded Breit corrections and QED calculations [61], while Safronova and Safronova [62] used the same approach but without QED corrections.…”

Section: Zn-like Yb 40+mentioning

confidence: 99%

“…In regards to theory, several calculations [12,28,31,[68][69][70][71][72] have been published for Cu-like ions. Here, we mention three state-of-the-art calculations following an accurate QED correction in addition to relativistic and electron correlation effects.…”

Section: Cu-like Yb 41+mentioning

confidence: 99%

Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions

Dipti

Silwal

Dreiling

et al. 2020

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

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Extreme ultraviolet spectra of highly-charged ytterbium ions produced in an electron beam ion trap at the National Institute of Standards and Technology were observed with a flat-field grazing incidence spectrometer in the wavelength region of about 4 nm–20 nm. The measured spectra were interpreted through detailed analysis by collisional-radiative modeling of the non-Maxwellian EBIT plasma. Seventy-nine new spectral lines due to intrashell (Δn = 0, n = 4) electric–dipole, magnetic–dipole, and electric–quadrupole transitions were identified in Rb-like Yb33+ through Ni-like Yb42+ ions. The effects of strong configuration interaction within the n = 4 complex on the measured spectra are discussed for a number of ionization stages.

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Wavelengths and transition probabilities for n=4→n′=4 transitions in heavy Cu-like ions (70⩽Z⩽92)

Cited by 16 publications

References 23 publications

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
View full text Add to dashboard Cite

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
View full text Add to dashboard Cite

Relativistic atomic data for Cu-like tungsten

Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions

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Wavelengths and transition probabilities for n=4→n′=4 transitions in heavy Cu-like ions (70⩽Z⩽92)

Cited by 16 publications

References 23 publications

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+Santana1, Lepson2, Beiersdörfer3 2015Phys. Rev. A295210View full textAdd to dashboardCite

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+Santana1, Lepson2, Beiersdörfer3 2015Phys. Rev. A295210View full textAdd to dashboardCite

Relativistic atomic data for Cu-like tungsten

Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions

Contact Info

Product

Resources

About

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
View full text Add to dashboard Cite

Electron-correlation effects on the3Cto3Dline-intensity ratio in the Ne-like ionsAr8+
Santana
¹
,
Lepson
²
,
Beiersdörfer
³

2015
Phys. Rev. A
29
5
21
0
View full text Add to dashboard Cite