Lifetimes of the 4d95plevels in Ag II

Irving, R. E.; Maniak, S. T.; Beideck, D. J.; Bengtsson, Peter; Curtis, L. J.; Hellborg, Ragnar; Kalus, Gabriele; Martinson, I.

doi:10.1088/0031-8949/51/3/012

Cited by 15 publications

(19 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be compared with the corresponding mean ratio between our experiment and the calculation by Theodosiou (1986) of 1.246 ± 0.057. Our measurements are in generally fair agreement with those obtained by Irving et al (1994) using beam-foil spectroscopy, within their larger error limits. However, agreement with the measurements of Plekhotkina (1981) is rather poor.…”

Section: Transition λ Vac (Nm) a (Hfr)supporting

confidence: 86%

“…However, agreement with the measurements of Plekhotkina (1981) is rather poor. As has been pointed out (Irving et al 1994), Plekhotkina used electron pulses very much longer than the lifetimes being studied. Furthermore, the electron energy (20-30 eV) was chosen to give the maximum excitation of the transition studied and hence was well above threshold for these levels.…”

Section: Transition λ Vac (Nm) a (Hfr)mentioning

confidence: 99%

“…In view of this successful study with Cu II, we decided to attempt a similar experimental/theoretical investigation on the homologous spectrum of singly ionized silver, Ag II. One justification for the work was the paucity of data available for Ag II concerning the lifetimes of the 4d 9 5p levels (Irving et al 1994, Plekhotkina 1981), particularly as it is known that this configuration is involved in several CW laser transitions (Johnson et al 1976). In addition, the potential exists that accurate oscillator strengths for transitions from these levels could be used to determine the cosmic abundance of silver (Irving et al 1994). However, we were aware at the outset that the situation would be less favourable than in Cu II from both the experimental and the theoretical points of view.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Beam - laser measurements and relativistic Hartree - Fock calculations of the lifetimes of the levels in Ag II

Biémont

Pinnington

Kernahan

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

We report measurements of 10 of the 4d 9 5p levels in Ag II using laser excitation of a fast beam, and we compare these results with those obtained from a calculation using Cowan's relativistic Hartree-Fock method. The mean ratio of the experimental and theoretical lifetimes is 1.057 ± 0.050. Our results are also compared with previous (non-laser) experiments and calculations. Here the agreement with our results is only fair.

show abstract

Section: Transition λ Vac (Nm) a (Hfr)supporting

confidence: 86%

Section: Transition λ Vac (Nm) a (Hfr)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Beam - laser measurements and relativistic Hartree - Fock calculations of the lifetimes of the levels in Ag II

Biémont

Pinnington

Kernahan

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…The ground term is now 4d 10 1 S and the lowest excited configurations are 4d 9 5s, 4d 8 5s 2 and 4d 9 5p. Using the BF method Irving et al (1995) determined the lifetimes of all 5p levels. As in the Au II case these experimental values were significantly longer than theoretical data, based on the Cowan-type calculations or those performed using the Coulomb approximation Hartree-Slater (CAHS) method.…”

Section: Discussionmentioning

confidence: 99%

Experimental and theoretical studies of lifetimes and transition probabilities for AuII

Zhang¹,

Brage

Curtis

et al. 2002

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

View full text Add to dashboard Cite

We report lifetime measurements for three of the 5d 9 6p levels in Au II and relativistic multiconfiguration Dirac-Fock (MCDF) calculations of lifetimes and transitions probabilities in this ion. The work was motivated by significant disagreements between previous experimental 5d 9 6p lifetimes, obtained by means of the beam-foil (BF) method and theoretical data based on Hartree-Fock calculations in which relativistic effects were included as perturbations. The new measurements, based on laser-induced fluorescence, support the BF data and are also in excellent agreement with the MCDF results. We confirm that, while computational methods which include perturbative relativistic corrections appear to be adequate for moderately heavy elements such as Ag, fully relativistic calculations are essential for describing systems as heavy as Au.

show abstract

“…The lifetimes reported by Irving et al (1995) (beam–foil spectroscopy) and by Biémont et al (1997) (beam–laser measurements) concern the 4d 9 5p configuration. The transition probabilities published by Ferrero et al (1995, 1996) from measurements of emission‐line intensities in an optically thin laser‐produced plasma or by Bogdanovich & Martinson (1999) (superposition‐of‐configuration approach) are related to transitions originating from the 4d 9 5p levels in Ag ii .…”

Section: Introductionmentioning

confidence: 95%

Radiative parameters for some transitions in the spectrum of Ag ii

Campos

Ortiz

Mayo

et al. 2005

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Radiative parameters for transitions depopulating the levels belonging to the 4d85s2, 4d96s and 4d95d configurations of Ag ii have been obtained from a combination of theoretical lifetimes and experimental branching fractions. On the experimental side, a laser‐produced plasma was used as a source of Ag+ ions. The light emitted by the plasma was analysed by a grating monochromator coupled with a time‐resolved optical multichannel analyser system. Spectral response calibration of the experimental system was performed using a deuterium lamp in the wavelength range from 200 to 400 nm, and a standard tungsten lamp in the range from 350 to 600 nm. The transition probabilities were obtained from measured branching ratios and theoretical radiative lifetimes of the corresponding states calculated with a relativistic Hartree–Fock approach including core‐polarization effects and configuration interaction in an extensive way. Theoretical and experimental data have been compared and the new data have also been compared with the few previous results available in the literature.

show abstract

Lifetimes of the 4d⁹5plevels in Ag II

Cited by 15 publications

References 17 publications

Beam - laser measurements and relativistic Hartree - Fock calculations of the lifetimes of the levels in Ag II

Beam - laser measurements and relativistic Hartree - Fock calculations of the lifetimes of the levels in Ag II

Experimental and theoretical studies of lifetimes and transition probabilities for AuII

Radiative parameters for some transitions in the spectrum of Ag ii

Contact Info

Product

Resources

About