Erratum for "Radiative Lifetimes and Hyperfine Induced Decay at the 1s 2p 3p2 and 3p0 Levels in Al XII", B. Denne, S. Huldt, J Pihl and R Hallin, Physica Scripta 22, 45 (1980)

Denne, B.; Huldt, S.; Pihl, J.; Hallin, R.

doi:10.1088/0031-8949/22/6/021

Cited by 5 publications

(8 citation statements)

References 11 publications

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“…11. To our knowledge, the available measurements of lifetimes for helium-like ions are mostly confined to 1s2l levels (Cocke et al 1973(Cocke et al , 1974aGould et al 1974;Bednar et al 1975;Varghese et al 1976;Dohmann & Mann 1979;Denne et al 1980;Armour et al 1981;Deschepper et al 1982;Dohmann et al 1982;Buchet et al 1984;Hubricht & Träbert 1987;Stefanelli et al 1995;Träbert et al 1999;Nandi et al 2004;Crespo López-Urrutia et al 2006). Figure 12 shows the comparison of our calculated lifetimes and experimental values as functions of Z for 1s2p 3 P 1 , 1s2p 3 P 2 and 1s2s 3 S 1 states.…”

Section: Radiative Lifetimesmentioning

confidence: 86%

“…Experimental data for 1s2s 3 S 1 are taken from Träbert et al (1999), Stefanelli et al (1995), Crespo López-Urrutia et al (2006), Bednar et al (1975), Hubricht & Träbert (1987), Cocke et al (1973), and Gould et al (1974). Values for 1s2p 3 P 2 are adopted from Denne et al (1980), Deschepper et al (1982), Cocke et al (1974b), Cocke et al (1974a), Dohmann & Mann (1979), Dohmann et al (1982), Buchet et al (1984), and Nandi et al (2004). For 1s2p 3 P 1 the values are taken from Armour et al (1981) and Varghese et al (1976).…”

Section: Discussionmentioning

confidence: 99%

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

Guo

Wang

et al. 2016

A&A

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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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Section: Radiative Lifetimesmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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

Guo

Wang

et al. 2016

A&A

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“…, (65) we see that more care is needed when m = v. We now concentrate on this case. If we make the approximation Σ vm (E 1 ) = Σ vm (ϵ v −k 0 ), it is possible to directly carry out the E 1 and E 2 integrations, with the result that gives the divergent energy…”

Section: Numerical Calculations and Tests Of Transition Amplitudesmentioning

confidence: 99%

Relativistic Calculations of Transition Amplitudes in the Helium Isoelectronic Sequence

Johnson

Plante

Sapirstein

1995

Advances in Atomic, Molecular, and Optical Physics

196

171

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Exact relativistic wave functions for n=1 and n=2 states of heliumlike ions are used to calculate single-photon transition amplitudes for 2 S0.Particular attention is given to the role of negative-energy states in bringing length and velocity forms into agreement, and related quantum electrodynamics issues. This is a reprinted version of an article with the same title published in Advances in Atomic, Molecular and Optical Physics 35, 225-329 (1995). Figures included in the original article are omitted here.

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“…Hyperfine line splitting is of importance in photopumped x-ray lasers [7], and hyperfine interaction affects the polarization of spectral lines used in plasma diagnostics [8]. Hyperfine interaction is sufficient to break symmetry in atoms and ions with a J=0 excited level above a J=0 ground level (typically in two-electron ions), and this can turn a very long-lived level (for example, 1s2p 3 P o 0 in heliumlike ions) into a shorter one [9], in some cases drastically so [10]. Hyperfine mixing also affects the lifetimes of other levels, such as the 1s2p 3 P o 2 level of He-like ions first measured in the 1970s [11].…”

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confidence: 99%