First observation of the blue optical lines of francium

H. T. Duong; P. Juncar; S. Liberman; A. C. Mueller; R. Neugart; E. W. Otten; B. Peuse; J. Pinard; H. H. Stroke; C. Thibault; F. Touchard; J. L. Vialle; K. Wendt

doi:10.1209/0295-5075/3/2/008

First observation of the blue optical lines of francium

H. T. Duong, P. Juncar, S. Liberman, A. C. Mueller, R. Neugart, E. W. Otten, B. Peuse, J. Pinard, H. H. Stroke, C. Thibault, F. Touchard, J. L. Vialle, K. Wendt

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Abstract

We report here the first wave-length measurements in the second resonance doublet of francium, D1'(7s²s1/2-8p²p 1/2) and d2'(7s²s1/2-8p²p 3/2), carried out by collinear fast-beam laser spectroscopy. The transition wave numbers are D1'=23112.9603(50) cm^-1 and D2'=23658.3058(40) cm^-1, corresponding to a 8p fine-structure splitting of ΔW8p=545.3454(70) cm^-1. In addition the hyperfine structure in both lines and the isotope shift in the D2' line for the isotopes ^{212, 213, 220, 221}Fr have been measured. The results are discussed with special emphasis on the analysis of the atomic structure in the heaviest alkali element and compared with theoretical predictions, as well as the only earlier spectroscopic data on francium obtained in the first resonance doublet.

Original language	English (US)
Pages (from-to)	175-182
Number of pages	8
Journal	Europhysics Letters
Volume	3
Issue number	2
DOIs	https://doi.org/10.1209/0295-5075/3/2/008
State	Published - Jan 15 1987

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General Physics and Astronomy

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@article{c2f01186942246889959ab8a8b7adc36,

title = "First observation of the blue optical lines of francium",

abstract = "We report here the first wave-length measurements in the second resonance doublet of francium, D1'(7s2s1/2-8p2p 1/2) and d2'(7s2s1/2-8p2p 3/2), carried out by collinear fast-beam laser spectroscopy. The transition wave numbers are D1'=23112.9603(50) cm-1 and D2'=23658.3058(40) cm-1, corresponding to a 8p fine-structure splitting of ΔW8p=545.3454(70) cm-1. In addition the hyperfine structure in both lines and the isotope shift in the D2' line for the isotopes 212, 213, 220, 221Fr have been measured. The results are discussed with special emphasis on the analysis of the atomic structure in the heaviest alkali element and compared with theoretical predictions, as well as the only earlier spectroscopic data on francium obtained in the first resonance doublet.",

author = "Duong, {H. T.} and P. Juncar and S. Liberman and Mueller, {A. C.} and R. Neugart and Otten, {E. W.} and B. Peuse and J. Pinard and Stroke, {H. H.} and C. Thibault and F. Touchard and Vialle, {J. L.} and K. Wendt",

year = "1987",

month = jan,

day = "15",

doi = "10.1209/0295-5075/3/2/008",

language = "English (US)",

volume = "3",

pages = "175--182",

journal = "Europhysics Letters",

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TY - JOUR

T1 - First observation of the blue optical lines of francium

AU - Duong, H. T.

AU - Juncar, P.

AU - Liberman, S.

AU - Mueller, A. C.

AU - Neugart, R.

AU - Otten, E. W.

AU - Peuse, B.

AU - Pinard, J.

AU - Stroke, H. H.

AU - Thibault, C.

AU - Touchard, F.

AU - Vialle, J. L.

AU - Wendt, K.

PY - 1987/1/15

Y1 - 1987/1/15

N2 - We report here the first wave-length measurements in the second resonance doublet of francium, D1'(7s2s1/2-8p2p 1/2) and d2'(7s2s1/2-8p2p 3/2), carried out by collinear fast-beam laser spectroscopy. The transition wave numbers are D1'=23112.9603(50) cm-1 and D2'=23658.3058(40) cm-1, corresponding to a 8p fine-structure splitting of ΔW8p=545.3454(70) cm-1. In addition the hyperfine structure in both lines and the isotope shift in the D2' line for the isotopes 212, 213, 220, 221Fr have been measured. The results are discussed with special emphasis on the analysis of the atomic structure in the heaviest alkali element and compared with theoretical predictions, as well as the only earlier spectroscopic data on francium obtained in the first resonance doublet.

AB - We report here the first wave-length measurements in the second resonance doublet of francium, D1'(7s2s1/2-8p2p 1/2) and d2'(7s2s1/2-8p2p 3/2), carried out by collinear fast-beam laser spectroscopy. The transition wave numbers are D1'=23112.9603(50) cm-1 and D2'=23658.3058(40) cm-1, corresponding to a 8p fine-structure splitting of ΔW8p=545.3454(70) cm-1. In addition the hyperfine structure in both lines and the isotope shift in the D2' line for the isotopes 212, 213, 220, 221Fr have been measured. The results are discussed with special emphasis on the analysis of the atomic structure in the heaviest alkali element and compared with theoretical predictions, as well as the only earlier spectroscopic data on francium obtained in the first resonance doublet.

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DO - 10.1209/0295-5075/3/2/008

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VL - 3

SP - 175

EP - 182

JO - Europhysics Letters

JF - Europhysics Letters

IS - 2

ER -

First observation of the blue optical lines of francium

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