Radiative lifetimes for states in Cu I

Biémont, Émile; Fryczynski, F.; Palmeri, P.; Quinet, Pascal; Zeippen, C. J.

doi:10.1016/0022-4073(95)00151-4

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…2.3.3). The proposed correction for the log g f (+0.08 dex) of these 674.8 nm transitions would agree closely with the line data of Biemont et al (1993).…”

Section: Adopted Line List and Computation Of The Grid Of Reference Synthetic Spectrasupporting

confidence: 73%

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

Perdigon

Laverny

Recio–Blanco

et al. 2021

A&A

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Context. Sulfur is a volatile chemical element that plays an important role in tracing the chemical evolution of the Milky Way and external galaxies. However, its nucleosynthesis origin and abundance variations in the Galaxy are still unclear because the number of available stellar sulfur abundance measurements is currently rather small. Aims. The goal of the present article is to accurately and precisely study the sulfur content of large number of stars located in the solar neighbourhood. Methods. We use the parametrisation of thousands of high-resolution stellar spectra provided by the AMBRE Project, and combine it with the automated abundance determination GAUGUIN to derive local thermodynamic equilibrium sulfur abundances for 1855 slow-rotating FGK-type stars. This is the largest and most precise catalogue of sulfur abundances published to date. It covers a metallicity domain as high as ∼2.5 dex starting at [M/H] ∼ −2.0 dex. Results. We find that the sulfur-to-iron abundances ratio is compatible with a plateau-like distribution in the metal-poor regime, and then starts to decrease continuously at [M/H] ∼ −1.0 dex. This decrease continues towards negative values for supersolar metallicity stars as recently reported for magnesium and as predicted by Galactic chemical evolution models. Moreover, sulfur-rich stars having metallicities in the range [ − 1.0, −0.5] have very different kinematical and orbital properties with respect to more metal-rich and sulfur-poor ones. Two disc components, associated with the thin and thick discs, are thus seen independently in kinematics and sulfur abundances. The sulfur radial gradients in the Galactic discs have also been estimated. Finally, the enrichment in sulfur with respect to iron is nicely correlated with stellar ages: older metal-poor stars have higher [S/M] ratios than younger metal-rich ones. Conclusions. This work has confirmed that sulfur is an α-element that could be considered to explore the Galactic populations properties. For the first time, a chemo-dynamical study from the sulfur abundance point of view, as a stand-alone chemical element, is performed.

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“…2.3.3). The proposed correction for the log g f (+0.08 dex) of these 674.8 nm transitions would agree closely with the line data of Biemont et al (1993).…”

Section: Adopted Line List and Computation Of The Grid Of Reference Synthetic Spectrasupporting

confidence: 73%

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

Perdigon

Laverny

Recio–Blanco

et al. 2021

A&A

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“…The computational method we have used to calculate the lifetimes of Cu II levels belonging to the 3d 9 4p configuration is similar to that described previously [14,15] and will only be summarized here. Slater parameters were first computed ab initio with the HFR method, i.e., a Hartree-Fock method [8,9] including relativistic corrections to the wave functions.…”

Section: Theoretical Methodsmentioning

confidence: 99%

Beam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 3d⁹4p levels in Cu II

Pinnington¹,

Rieger²,

Kernahan³

et al. 1997

Can. J. Phys.

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We report the first lifetime measurements for Cu II using laser excitation of a fast beam. We present results for 10 levels belonging to the 3d 9 4p configuration. We also report the lifetimes we have calculated for these levels using Cowan's relativistic Hartree-Fock method. We compare our results with previous measurements and calculations.Résumé : Nous présentons les premières durées de vie radiative de Cu II obtenues à partir de l'excitation laser d'un faisceau d'ions rapides. Des résultats ont été obtenues pour 10 niveaux appartenant à la configuration 3d 9 4p. Nous présentons également, pour ces même niveaux, des durées de vie calculées par la méthode Hartree-Fock relativiste ainsi qu'une comparaison de nos résultats avec des mesures et des calculs antérieurs.

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Hyperfine structure analysis in the intense spectral lines of the neutral Cu atom falling in the 353–809nm wavelength region using a Fourier transform spectrometer

Ankush

Deo

2014

Journal of Quantitative Spectroscopy and Radiative Transfer

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Radiative lifetimes for states in Cu I

Cited by 6 publications

References 34 publications

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

Beam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 3d⁹4p levels in Cu II

Hyperfine structure analysis in the intense spectral lines of the neutral Cu atom falling in the 353–809nm wavelength region using a Fourier transform spectrometer

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Radiative lifetimes for states in Cu I

Cited by 6 publications

References 34 publications

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

The AMBRE Project: Origin and evolution of sulfur in the Milky Way

Beam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 3d94p levels in Cu II

Hyperfine structure analysis in the intense spectral lines of the neutral Cu atom falling in the 353–809nm wavelength region using a Fourier transform spectrometer

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Beam-laser measurements and relativistic Hartree-Fock calculations of the lifetimes of the 3d⁹4p levels in Cu II