A lifetime measurement of the 1s2p<sup>3</sup>P<sub>1</sub>level in helium-like Mg and Al

Armour, I A; Silver, J. D.; Trabert, E

doi:10.1088/0022-3700/14/19/009

Cited by 17 publications

(7 citation statements)

References 14 publications

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“…HULLAC total widths (Behar & Netzer 2002) are systematically shorter by up to a factor of 2 or more than both our HFR and AUTOSTRUCTURE values. Comparisons of our predicted lifetimes with the available measurements (Armour et al 1981;Buchet et al 1984;Hellmann & Träbert 1985) have shown the importance of the two-body Breit interactions.…”

Section: Discussionsupporting

confidence: 66%

“…The available experimental lifetimes (Armour et al 1981;Buchet et al 1984;Hellmann & Träbert 1985) are compared to our predictions and to those of Chen et al (1982) and Vainshtein & Safronova (1978) in Table 10. Our AUTOSTRUCTURE and MCDF predictions and those of Chen et al (1982) agree reasonably well with the BFS lifetimes, whereas our HFR values for the 1s2p 3 P o 1 He-like and 1s( 2 S)2p 2 ( 3 P) 4 P 3/2 Li-like levels are discrepant by up to a factor of ∼2.…”

Section: Notes (A) In a ± B A Is The Actual Average And B Is The Stmentioning

confidence: 93%

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Atomic decay data for modeling the Al K lines

Palmeri

Quinet

Mendoza

et al. 2010

A&A

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Radiative and Auger decay data have been calculated for modeling the K lines of the aluminum isonuclear sequence, from Al 0 up to Al 11+ . Level energies, transition wavelengths, radiative transition probabilities, and radiative and Auger widths were determined using Cowan's Hartree-Fock with relativistic corrections (HFR) method. Results are compared with data sets computed with the AUTOSTRUCTURE and GRASP atomic structure codes and with available experimental and theoretical values, mainly in highly ionized ions and in the solid state.

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Section: Discussionsupporting

confidence: 66%

Section: Notes (A) In a ± B A Is The Actual Average And B Is The Stmentioning

confidence: 93%

Atomic decay data for modeling the Al K lines

Palmeri

Quinet

Mendoza

et al. 2010

A&A

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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%

“…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). Z = 10−36.…”

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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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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“…e Value from Davis & Marrus (1977). f Value from Armour et al (1981). g Value from Varghese et al (1976a).…”

Section: Radiative and Auger Widthsmentioning

confidence: 99%

Radiative and Auger Decay of K‐Vacancy Levels in the Ne, Mg, Si, S, Ar, and Ca Isonuclear Sequences

Palmeri

Quinet

Mendoza

et al. 2008

ASTROPHYS J SUPPL S

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The HFR and AUTOSTRUCTURE atomic structure codes are used to compute complete data sets of level energies, wavelengths, A-values, and radiative and Auger widths for K-vacancy states of the Ne, Mg, Si, S, Ar, and Ca isonuclear sequences. Ions with electron number N > 9 are treated for the first time. Detailed comparisons with previous measurements and theoretical data for ions with N 9 are carried out in order to estimate reliable accuracy ratings.

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A lifetime measurement of the 1s2p³P₁level in helium-like Mg and Al

Cited by 17 publications

References 14 publications

Atomic decay data for modeling the Al K lines

Atomic decay data for modeling the Al K lines

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

Radiative and Auger Decay of K‐Vacancy Levels in the Ne, Mg, Si, S, Ar, and Ca Isonuclear Sequences

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A lifetime measurement of the 1s2p3P1level in helium-like Mg and Al

Cited by 17 publications

References 14 publications

Atomic decay data for modeling the Al K lines

Atomic decay data for modeling the Al K lines

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

Radiative and Auger Decay of K‐Vacancy Levels in the Ne, Mg, Si, S, Ar, and Ca Isonuclear Sequences

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A lifetime measurement of the 1s2p³P₁level in helium-like Mg and Al