We report new precision measurements of isotope shifts for a multitude of transitions in 20,22Ne isotopes. Shifts of roughly 2GHz, for transitions with linewidth of 20MHz, are measured with uncertainty of 200kHz utilizing the technique of dual sideband absorption spectroscopy invented in our lab [1].

Our results, as well as every other historical measurement (100 years, 50 publications, 150 transitions) are combined in a linear global fit to obtain the isotope shift of all 50 law-lying neon levels with high precision.

Relying on the analogy between isotope-shift and fine-sturcture operators, combined with state of the art, ab. initio. field-shift calculations [2], we explain this plethora of neon level-shifts throguh only 20 effective parameters in a global parametric investigation.

Our results provide a birds-eye view on the IS phenomena in noble gasses, pinpointing various relativstic and nuclear effects.

[1] Measurement of the 20−22Ne 3P2-3D3 transition isotope shift using a single, phase modulated laser beam. Ben Ohayon, Gal Gumpel, Guy Ron

[2] AMBiT: A program for high-precision relativistic atomic structure calculations. E. V. Kahl, J. C. Berengut