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arXiv · 1909.01991

Isotope shifts in $^{20,22}$Ne -- Precision measurements and global analysis in the framework of intermediate coupling

B. Ohayon·H. Rahangdale·A. J. Geddes·J. C. Berengut·G. Ron
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Abstract

We report new precision measurements of the $^{20}$Ne--$^{22}$Ne isotope shift for several transitions, as well as state-of-the-art, \textit{ab initio} field-shift calculations. Our results are combined with historical measurements in a global fit to obtain the isotope shifts of all fifty low-lying neon levels with high precision. These level shifts show a wealth of electronic, nuclear, and relativistic phenomena. Relying on the analogy between mass shift and fine-structure operators, we explain this plethora of neon level-shifts utilizing a small number of effective parameters in a global parametric investigation. This investigation provides a birds-eye view on the isotope shift phenomena in noble gasses. From this vantage point, we reinterpret every effort made to calculate neon mass-shifts \textit{ab initio}, and show that a remarkable agreement between experiment and theory is obtained.

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B. Ohayon, H. Rahangdale, A. J. Geddes, J. C. Berengut, G. Ron. 2019-09-04. Isotope shifts in $^{20,22}$Ne -- Precision measurements and global analysis in the framework of intermediate coupling. https://doi.org/10.1103/physreva.99.042503

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