Determination of radiative lifetimes of excited states in neutral gold using time-resolved vacuum-ultraviolet laser spectroscopy

Gaarde, Mette B.; Zerne, R; Caiyan, Luo; Jiang, Zhaoqiang; Larsson, Jörgen; Svanberg, Sune

doi:10.1103/physreva.50.209

Cited by 28 publications

(19 citation statements)

References 10 publications

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“…The best available g f -value for the Au i line comes from Hannaford et al (1981), who obtained log g f = −0.95 ± 0.06 with lifetime and branching fraction measurements. The lifetime of Hannaford et al for the upper level agrees perfectly with that obtained by Gaarde et al (1994) using a similar technique. et al (2000) used one Pb i line, for which they had accurately derived the g f -value, to revise the solar Pb abundance.…”

Section: Goldsupporting

confidence: 76%

The elemental composition of the Sun III. The heavy elements Cu to Th

Grevesse,

Scott,

Asplund

et al. 2014

Preprint

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We re-evaluate the abundances of the elements in the Sun from copper (Z = 29) to thorium (Z = 90). Our results are mostly based on neutral and singly-ionised lines in the solar spectrum. We use the latest 3D hydrodynamic solar model atmosphere, and in a few cases also correct for departures from local thermodynamic equilibrium (LTE) using non-LTE (NLTE) calculations performed in 1D. In order to minimise statistical and systematic uncertainties, we make stringent line selections, employ the highest-quality observational data and carefully assess oscillator strengths, hyperfine constants and isotopic separations available in the literature, for every line included in our analysis. Our results are typically in good agreement with the abundances in the most pristine meteorites, but there are some interesting exceptions. This analysis constitutes both a full exposition and a slight update of the relevant parts of the preliminary results we presented in Asplund, Grevesse, Sauval & Scott (2009), including full line lists and details of all input data that we have employed.

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Section: Goldsupporting

confidence: 76%

The elemental composition of the Sun III. The heavy elements Cu to Th

Grevesse,

Scott,

Asplund

et al. 2014

Preprint

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“…Note that the decay times τ 1-10 µs given in Table I cannot be justified as the radiative lifetimes of the isolated Au atom levels, which are at least two orders shorter [32]. The time dynamics shown in Fig.…”

Section: Resultsmentioning

confidence: 94%

“…The natural broadening can be estimated from the radiative lifetimes of Au atomic states. For example, the radiative lifetimes of 8p and 9p states are 20-70 ns [32] and give the natural linewidth estimation of an order of 10 −3 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Time-resolved Fourier-transform infrared emission spectroscopy of Au in the1800–4000−cm−1region: Rydberg transitions

et al. 2010

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Time-resolved Fourier-transform infrared spectroscopy was applied for observations of the emission arising after irradiation of a Au target with a pulsed nanosecond ArF (λ = 193 nm) laser. A high-repetition-rate laser (1.0 kHz) with an output energy of 15 mJ was focused on a rotating metal target inside a vacuum chamber (average pressure 10 −2 Torr). The infrared emission spectra were observed in the 1800-4000 cm −1 spectral region with a time profile showing maximum emission intensity in 9-11 µs after a laser shot. Seven prominent lines are reported; most of them are identified as being due to transitions between low Rydberg nl states of Au with n = 5-10 and l = 0-3. An alternative identification (6f 5/2 → 7d 3/2 ) is given for the 2518.489 cm −1 line previously classified as 8d 5/2 → 5f 5/2 . On the basis of the measured lines, three f levels of the Au atom are reported and revised values are given for six other levels.

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“…[11,5,[12][13][14] and with experimental measurements from Refs. [15][16][17]. Large-scale ab initio multiconfiguration Dirac-Fock (MCDF) calculations were used in [11] to obtain oscillator strengths and hyperfine-structure parameters for the lowest few levels in Tl III.…”

Section: Introductionmentioning

confidence: 99%

“…Determinations of radiative lifetimes of excited states in neutral gold using time-resolved vacuum-ultraviolet laser spectroscopy were reported in Ref. [15]. Recently, in Ref.…”

Section: Introductionmentioning

confidence: 99%

Excitation energies, oscillator strengths, and lifetimes of levels along the gold isoelectronic sequence

Safronova

Johnson

2004

Phys. Rev. A

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Energies of ns 1/2 ͑n =6-9͒, np j ͑n =6-8͒, nd j ͑n =6-7͒, and 5f j states in neutral Au and Au-like ions with nuclear charges Z = 80-83 are calculated using relativistic many-body perturbation theory. Reduced matrix elements, oscillator strengths, transition rates and lifetimes are determined for the 30 possible nl j − nЈl j Ј Ј electric-dipole transitions. Results for a limited number states ns 1/2 , np j ͑n =6-7͒ and 6d j are obtained in the relativistic single-double (SD) approximation, where single and double excitations of Dirac-Fock wave functions are included to all orders in perturbation theory. Using SD wave functions, accurate values are obtained for energies of the eight lowest states and for the fourteen possible electric-dipole matrix elements between these states. With the aid of the SD wave functions, we also determine transition rates and oscillator strengths for the fourteen transitions together with lifetimes of 6p j , 7p j , and 6d j levels. We investigate the hyperfine structure in Hg II and Tl III. The hyperfine A values are determined for 6s 1/2 and 6p j states in 199 Hg + , 201 Hg + , and 205 Tl 2+ isotopes. These calculations provide a theoretical benchmark for comparison with experiment and theory.

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Determination of radiative lifetimes of excited states in neutral gold using time-resolved vacuum-ultraviolet laser spectroscopy

Cited by 28 publications

References 10 publications

The elemental composition of the Sun III. The heavy elements Cu to Th

The elemental composition of the Sun III. The heavy elements Cu to Th

Time-resolved Fourier-transform infrared emission spectroscopy of Au in the1800–4000−cm−1region: Rydberg transitions

Excitation energies, oscillator strengths, and lifetimes of levels along the gold isoelectronic sequence

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