Laser-microwave spectroscopy in the excited 1s2s3S1 and 1s2p3P hyperfine multiplets of helium-like6,7Li+

Kowalski, J.; Neumann, R.; Noehte, S.; Scheffzek, K.; Suhr, Harald; Putlitz, G. zu

doi:10.1007/bf02159731

Cited by 30 publications

(11 citation statements)

References 4 publications

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“…A summary of the present accuracy as well as an outlook on the accuracy we believe can be reached in the near future is given in Table 1 [5,6] respectively. One of the 3S1---+3/D 2 transitions can be measured relative to a 127J 2 reference line, which can then be precisely calibrated.…”

Section: Resultsmentioning

confidence: 95%

“…Comparison with (5) shows that the experimental verification of SRT is equivalent to an upper limit on the parameter 5e. In our storage ring experiment the ion velocity…”

Section: Vpmentioning

confidence: 96%

“…Thus in order to study the validity of SRT, four frequencies have to be measured as precisely as possible; the two rest frame frequencies, which are known from literature [5,6] to an accuracy of _+ 1.6.10 s, and the two laser frequencies Vp and v a .…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the transverse Doppler shift using a stored relativistic7Li+ ion beam

Klein

Grieser

Hoog

et al. 1992

Z. Physik A - Hadrons and Nuclei

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We have performed for the first time precision spectroscopy on a coasting fast 7Li+ ion beam in a storage ring. The ion beam moving with 6.4% speed of light was first electron cooled and then merged with two counterpropagating laser beams acting on two different hyperfine transitions sharing a common upper level (A-system). One laser was frequency locked to the a 3 127j 2 hfs frequency component established as a secondary frequency standard at 514 nm. The second laser was tuned over the A-resonance, which was recorded relative to 127j 2 hfs components. This experiment is sensitive to the time dilation in fast moving frames and will lead to new limits for the verification of special relatively. The present status of the experiment and perspectives in accuracy are discussed.

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Section: Resultsmentioning

confidence: 95%

“…Comparison with (5) shows that the experimental verification of SRT is equivalent to an upper limit on the parameter 5e. In our storage ring experiment the ion velocity…”

Section: Vpmentioning

confidence: 96%

See 1 more Smart Citation

Measurement of the transverse Doppler shift using a stored relativistic7Li+ ion beam

Klein

Grieser

Hoog

et al. 1992

Z. Physik A - Hadrons and Nuclei

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“…The present work is motivated by an analysis of the recent experimental results for the HFS of 7 Li + of Guan et al [14], as well as by the ongoing experiment on 6 Li + in our laboratory at Wuhan. Following earlier work [15][16][17][18][19][20], their measurements represent a major step forward in precision for the fine and hyperfine structure for the 2 3 S 1 and 2 3 P J states of 7 Li + , with uncertainties of less than 100 kHz. These experimental activities will present an important opportunity to probe the nuclear structure of lithium isotopes, particularly for the exist-ing large discrepancy between theory and experiment in the Zemach radius of the 6 Li nucleus.…”

mentioning

confidence: 91%

“…Zemach radii.-A combination of the experimental [14,18] and theoretical results for the HFS of the 2 3 S 1 state can be used to determine the contribution of nuclear structure and extract the Zemach radii. Numerical values of the relevant operators are presented in Section III of the Supplemental Material.…”

mentioning

confidence: 99%

Precision calculation of hyperfine structure and the Zemach radii of $^{6,7}$Li$^+$ ions

Qi,

Zhang,

Yan

et al. 2020

Preprint

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The hyperfine structures of the 2 3 S1 states of the 6 Li + and 7 Li + ions are investigated theoretically to extract the Zemach radii of the 6 Li and 7 Li nuclei by comparing with precision measurements. The obtained Zemach radii are larger than the previous values of Puchalski and Pachucki [Phys. Rev. Lett. 111, 243001 (2013)] and disagree with them by about 1.5 and 2.2 standard deviations for 6 Li and 7 Li, respectively. Furthermore, our Zemach radius of 6 Li differs significantly from the nuclear physics value, derived from the nuclear charge and magnetic radii [Phys. Rev. A 78, 012513 (2008)], by more than 6 sigma, indicating an anomalous nuclear structure for 6 Li. The conclusion that the Zemach radius of 7 Li is about 40% larger than that of 6 Li is confirmed. The obtained Zemach radii are used to calculate the hyperfine splittings of the 2 3 PJ states of 6,7 Li + , where an order of magnitude improvement over the previous theory has been achieved for 7 Li + .

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