Dye laser saturation spectroscopy of the 23 S 1-23 P transition in6, 7Li+ ions

Bayer, Reinhold; Kowalski, J.; Neumann, R.; Noehte, S.; Suhr, Harald; Winkler, Klaus; Putlitz, G. zu

doi:10.1007/bf01546430

Cited by 35 publications

(12 citation statements)

References 37 publications

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“…(Li II) Since the pioneering work, already mentioned, of Schuler (1927) and Hughes and Eckart (1930), there have been very few measurements of isotope shifts in Li II (the second spectrum of lithium, i.e., the spectrum of Li+). The interest has been much more in hyperfine structure, but the isotope shift in the 2s 3 S-2p 3 P transitions has recently been measured by Bayer et al (1979).…”

Section: Table33mentioning

confidence: 99%

Isotope Shifts in Atomic Spectra

King¹

1984

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Section: Table33mentioning

confidence: 99%

Isotope Shifts in Atomic Spectra

King¹

1984

403

400

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“…Accurate experimental measurements of the two-electron fine-structure splittings in the I s Pj multiplet have been performed in He and Li + using radio-frequency spectroscopy [5] and laser spectroscopy [6]. The extension of laser spectroscopy to the heliumlike ion F 7+ was achieved by Myers et al [7], who measured the interval 2 3 / > i-2 3 / > 2 (AE1.2).…”

mentioning

confidence: 99%

Hyperfine quenching and precision measurement of the 2P03-2
Indelicato
¹
,
Birkett
²
,
Briand
³

et al. 1992
Phys. Rev. Lett.
60
4
19
0
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The hyperfine-quenched transition 2 3 /Vl 'So has been observed in heliumlike gadolinium (Gd 62+ ) in the two isotopes ,55 Gd and ,57 Gd. The lifetime for the transition (to) has been measured for each isotope and found to be r 0 (l55) = 13.43(27)x 10" l2 sec and r 0 (l57) =7.65(55)x 10" ,2 sec. From the measured lifetimes a value is inferred for the absolute value of the 2 3 Po-2 3 P\ fine-structuring splitting |A£o-i| in Gd 62+ with the result |AEo-i| = 18.57(19) eV, where the error represents 1 standard deviation. This result is compared with calculations based on the multiconfiguration Dirac-Fock method and on the unified method. PACS numbers: 32.30.Rj, 12.20.Fv, 31.30.Jv, 32.70.FwThe splittings of the I s Pj levels [l] in two-electron ions (AEJ.J) are determined largely by the electron-electron interaction. The measurement of these splittings constitutes, therefore, a test of theories of this interaction in the simplest atomic system in which it can be observed. Because of the rapid scaling of the relativistic part of this interaction with atomic number Z, measurements at high Z provide a particularly sensitive test of the relativistic theory. Calculations of the fine-structure splittings generally include the effects of relativity by a perturbation expansion in the parameter (Z«) 2 . The problems associated with this approach at high Z are illustrated by the fact that in ordinary helium (Z=2) the calculations [2] are accurate at the ppm level, whereas the most elaborate calculations [3,4] at Z=64 are accurate at only the few percent level. Accurate experimental measurements performed at high Z can therefore act to stimulate further theoretical work in including relativistic effects in the calculation of two-electron energy levels.Accurate experimental measurements of the two-electron fine-structure splittings in the I s Pj multiplet have been performed in He and Li + using radio-frequency spectroscopy [5] and laser spectroscopy [6]. The extension of laser spectroscopy to the heliumlike ion F 7+ was achieved by Myers et al.[7], who measured the interval 2 3 / > i-2 3 / > 2 (AE1.2). However, extension of the laser method to much higher Z is experimentally not feasible. Indirect measurements using x-ray and UV spectroscopy have been performed and are summarized in review articles by Martin [8] and Desequelles [9], but such measurements have not been very precise. So far there have been no measurements reported with sufficient precision to examine the theoretical predictions at high Z. In thisLetter we describe the first measurement at high Z with a precision smaller than the current theoretical accuracy.The measurement reported here is of the interval AEo.\ in the two-electron ion Gd 62+ . Gadolinium has a number of stable even-even isotopes with nuclear spin 7=0. For these isotopes, the radiative decay 2 3 /Vl '-So is strictly forbidden and the 2 3 / > o state undergoes E\ decay to the 2 3 S1 state with a calculated lifetime [10] of r(2 3 / > 0 ) =0.339xl0~9 sec. Gadolinium also has two stable isotopes ( ,55 ...

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“…Extensions of the calculations to higher Z have been based primarily on the variational method developed by Drake 4 and the multiconfiguration Dirac-Fock (MCDF) method of Desclaux. 5 Accurate experimental measurements of the splittings (AEj_j>) have been performed in He and Li + based on radio-frequency spectroscopy 6 and laser spectroscopy, 7 respectively. The extension of laser spectroscopy to the heliumlike ion F 7+ was achieved by Myers et a/., 8 who measured the interval AE 1 _ 2 .…”

mentioning

confidence: 99%

Measurement of the (1s)(2p1/2)23
Marrus
¹
,
Simionovici
²
,
Indelicato
³

et al. 1989
Phys. Rev. Lett.
47
2
12
0
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A new method is described which is capable of determining | AEo.\ I, the absolute value of the finestructure splitting of the interval 2 3 / > o-2 3 / > i from the hyperfine-quenched lifetime of the 2 3 Po state of heliumlike ions with nuclear spin. Based on this method a measurement is reported of | AZTo-i | in the heliumlike ion 107 Ag 45+ with the result | AEo-i I =0.74-8:! § eV. The error in the measurement is substantially smaller than the natural linewidth of 1.1 eV.

show abstract

Dye laser saturation spectroscopy of the 23 S 1-23 P transition in6, 7Li+ ions

Cited by 35 publications

References 37 publications

Isotope Shifts in Atomic Spectra

Isotope Shifts in Atomic Spectra

Hyperfine quenching and precision measurement of the 2P03-2
Indelicato
¹
,
Birkett
²
,
Briand
³

et al. 1992
Phys. Rev. Lett.
60
4
19
0
View full text Add to dashboard Cite

Measurement of the (1s)(2p1/2)23
Marrus
¹
,
Simionovici
²
,
Indelicato
³

et al. 1989
Phys. Rev. Lett.
47
2
12
0
View full text Add to dashboard Cite

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Dye laser saturation spectroscopy of the 23 S 1-23 P transition in6, 7Li+ ions

Cited by 35 publications

References 37 publications

Isotope Shifts in Atomic Spectra

Isotope Shifts in Atomic Spectra

Hyperfine quenching and precision measurement of the 2P03-2Indelicato1, Birkett2, Briand3 et al. 1992Phys. Rev. Lett.604190View full textAdd to dashboardCite

Measurement of the (1s)(2p1/2)23Marrus1, Simionovici2, Indelicato3 et al. 1989Phys. Rev. Lett.472120View full textAdd to dashboardCite

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Hyperfine quenching and precision measurement of the 2P03-2
Indelicato
¹
,
Birkett
²
,
Briand
³

et al. 1992
Phys. Rev. Lett.
60
4
19
0
View full text Add to dashboard Cite

Measurement of the (1s)(2p1/2)23
Marrus
¹
,
Simionovici
²
,
Indelicato
³

et al. 1989
Phys. Rev. Lett.
47
2
12
0
View full text Add to dashboard Cite