1997
DOI: 10.1088/0953-4075/30/9/009
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Beam - laser measurements and relativistic Hartree - Fock calculations of the lifetimes of the levels in Ag II

Abstract: 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.

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Cited by 18 publications
(31 citation statements)
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“…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. Somewhat later a beam-laser (BL) study of Ag II lifetimes was reported (Biemont et al 1997) but here the results for the 5p levels were approximately 20% shorter than the BF results of Irving et al (1995). The BL method is superior to the BF one, although not as general.…”
Section: Discussionmentioning
confidence: 50%
“…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. Somewhat later a beam-laser (BL) study of Ag II lifetimes was reported (Biemont et al 1997) but here the results for the 5p levels were approximately 20% shorter than the BF results of Irving et al (1995). The BL method is superior to the BF one, although not as general.…”
Section: Discussionmentioning
confidence: 50%
“…A first argument in favour of the HFR(A) model results from the fact that previous HFR calculations (Biémont et al 1997), obtained with a similar atomic model, are in close agreement (the mean deviation being 6.1 per cent for 10 levels) with accurate beam–laser measurements for 4d 9 5p levels.…”
Section: Discussion Of the Resultsmentioning
confidence: 96%
“…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%
“…Because of the various problems discussed above, it was necessary to record a large number (typically 25) of decay curves for each level studied. Full details of the experimental procedures are available elsewhere ( Ansbacher et al 1989; Biémont et al 1997; Pinnington et al 1997).…”
Section: Lifetime Measurementsmentioning
confidence: 99%