Atomic data for opacity calculations. IX. The lithium isoelectronic sequence

Peach, G.; Saraph, H. E.; Seaton, M. J.

doi:10.1088/0953-4075/21/22/006

Cited by 165 publications

(103 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We selected data from seven advanced calculations [31][32][33][34][35][36][37] and used high-precision radiative lifetime measurements [38][39][40] for an independent check of some theoretical results. The majority of tabulated data comes from the close-coupling calculations by Peach et al 37 A finding list and transition probabilities for the allowed lines of ͑Li I͒ are given in Tables 17-19.…”

Section: I Allowed Transitionsmentioning

confidence: 99%

“…Results for other transitions of Li I were selected in the following order: First, the variational-Hylleraas-type calculations by Yan,32 then the multiconfiguration Hartree-Fock calculations of Froese Fischer et al, 33 third the results of the superposition of correlated configurations method by Pestka and Woznicki, 34 fourth a full-core-plus-correlation method by Qu et al, 35,36 and finally the close-coupling calculations of Peach et al, 37 by utilizing the R-matrix technique. In addition to the data overlap for the two transitions shown in Table 1 40 …”

Section: I Allowed Transitionsmentioning

confidence: 99%

See 1 more Smart Citation

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium

Wiese

Fuhr

2009

Journal of Physical and Chemical Reference Data

218

112

View full text Add to dashboard Cite

We have carried out a comprehensive tabulation of the atomic transition probabilities for allowed and forbidden lines of hydrogen, helium and lithium, including Li II, as well as the hydrogen isotopes deuterium and tritium. Altogether, we tabulated about 3600 transitions and listed scaling relations for the hydrogenlike ions He II and Li III. The selected data are based on a critical evaluation of available literature sources and are all taken from recent advanced calculations. The tables are normally arranged in multiplets, and these are ordered in increasing excitation energies. For hydrogen, deuterium, and tritium, the energy levels are degenerate, i.e., all energy levels of the same principal quantum number essentially coincide. Thus, the principal tables for these species are for the average transition probabilities of lines between different principal quantum numbers. © 2009 by the U. S. Secretary of Commerce on behalf of the United States. All rights reserved.

show abstract

Section: I Allowed Transitionsmentioning

confidence: 99%

Section: I Allowed Transitionsmentioning

confidence: 99%

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium

Wiese

Fuhr

2009

Journal of Physical and Chemical Reference Data

218

112

View full text Add to dashboard Cite

show abstract

“…The bothersome situation for neutral lithium becomes yet more puzzling when placed in the context of all the other published calculations designed to fully account for correlation (7,(21)(22)(23). This is illustrated in Table 5, which compares all these values with the experiment and with each other.…”

Section: Oscillator Strength Resultsmentioning

confidence: 99%

The calculation of atomic oscillator strengths: the lithium atom revisited

Weiss¹

1992

Can. J. Chem.

View full text Add to dashboard Cite

interaction calculations have been done for the ground and first excited states of neutral lithium and singly ionized beryllium. While the calculations reproduce the ionization and excitation energies to within 3 cm-I for Li and 10 cm-I for ~e ' , the main purpose of this work is the accurate evaluation of the 2s-2p resonance line oscillator strength. The calculated value of 0.7478 agrees to within less than 1% with the very accurate laser excitation lifetime measurement of 0.7416 * 0.0012. However, internal consistency checks of the accuracy of these calculations suggest that more precise calculations are unlikely to reduce this discrepancy significantly. Furthermore, when placed together with other independent calculations that should be of comparable, if not better, accuracy, all theoretical predictions strongly indicate an f-value of 0.7475 * 0.0010, which differs from the experiment by 4 experimental standard deviations.Key words: configuration interaction, correlation, oscillator strength.A. W. W~rss. Can. J . Chem. 70, 456 (1992). On a effectut des calculs Ctendus d'interactions de configuration de I'ttat fondamental et du premier Ctat excite du lithium neutre et du beryllium mono-ionisC. Alors que les calculs permettent de reproduire les energies d'ionisation et d'excitation a moins de 3 cm-' pour le Li et a moins de 10 cm-' pour le Be+, le but principal de ce travail est d7Cvaluer d'une faqon precise la force de l'oscillateur de la raie de resonance 2s-2p. La valeur calculee, 0,7478, est a moins de 1% de la valeur tres precise, 0,7416 * 0,0012, obtenue par des mesures de temps de vie d'excitation au laser. Toutefois, des evaluations d'auto-coherence de la precision de ces calculs laissent croire que des calculs plus precis ne reduiraient pas cette difference d'une faqon significative. De plus, lorsqu'on utilise cette valeur avec celles obtenues par d'autres calculs independants d'une precision au moins semblable, si non meilleure, on en deduit que toutes les predictions thkoriques indiquent fortement que la valeur de f est Cgale a 0,7475 2 0,0010 qui differe de la valeur experimentale par 4 kcarts types expkrimentaux.

show abstract

“…However, it is rather weak because it constitutes a spin-changing E1 transition. For the lithium-like ion N V, we adopt data from Peach et al (1988). For the N V lines, we performed an accuracy check because these data are coming from nonrelativistic calculations.…”

Section: Nitrogen Speciesmentioning

confidence: 99%

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Cashman

Kulkarni

Kisielius

et al. 2017

ApJS

View full text Add to dashboard Cite

Measurements of element abundances in galaxies from astrophysical spectroscopy depend sensitively on the atomic data used. With the goal of making the latest atomic data accessible to the community, we present a compilation of selected atomic data for resonant absorption lines at wavelengths longward of 911.753Å (the H I Lyman limit), for key heavy elements (heavier than atomic number 5) of astrophysical interest. In particular, we focus on the transitions of those ions that have been observed in the Milky Way interstellar medium (ISM), the circumgalactic medium (CGM) of the Milky Way and/or other galaxies, and the intergalactic medium (IGM). We provide wavelengths, oscillator strengths, associated accuracy grades, and references to the oscillator strength determinations. We also attempt to compare and assess the recent oscillator strength determinations. For about 22% of the lines that have updated oscillator strength values, the differences between the former values and the updated ones are 0.1 dex. Our compilation will be a useful resource for absorption line studies of the ISM, as well as studies of the CGM and IGM traced by sight lines to quasars and gamma-ray bursts. Studies (including those enabled by future generations of extremely large telescopes) of absorption by galaxies against the light of background galaxies will also benefit from our compilation.

show abstract

Atomic data for opacity calculations. IX. The lithium isoelectronic sequence

Cited by 165 publications

References 31 publications

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium

The calculation of atomic oscillator strengths: the lithium atom revisited

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Contact Info

Product

Resources

About