Isotope shift measurement of the 423-nm transition in neutral Ca
Abstract
We report on saturated absorption spectroscopy measurements of the $(4s^2) ^{1}S_0\rightarrow(4s4p) ^{1}P_1$ 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.
- Publication:
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arXiv e-prints
- Pub Date:
- June 2024
- DOI:
- 10.48550/arXiv.2406.06806
- arXiv:
- arXiv:2406.06806
- Bibcode:
- 2024arXiv240606806R
- Keywords:
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- Physics - Atomic Physics;
- Quantum Physics
- E-Print:
- 6 pages, 4 figures