Isotope shift measurement of the 423-nm transition in neutral Ca

2024/06/10 by Röser, David, Möller, Lukas, Keßler, Hans +1 · 2 citations
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2406.06806

Abstract

We report on saturated absorption spectroscopy measurements of the (4s²) ¹S₀→(4s4p) ¹P₁ transition for the four most abundant even-mass isotopes in calcium. By referencing the laser locked to an ultralow expansion cavity and carefully investigating systematic errors, isotope shifts are determined with a precision below 100 kHz, improving previously reported values by a factor of about five. A King plot analysis employing literature values of the 729-nm transition in Ca ions shows excellent linearity. The field and mass shift parameters are determined from King plots with other transitions.

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