Isotope shift of 40,42,44,48Ca in the 4s2S1/2→4p2P3/2 transition

Gorges, C.; Blaum, Klaus; Frömmgen, N.; Geppert, Ch.; Hammen, M.; Kaufmann, S.; Krämer, J.; Krieger, A.; Neugart , R.; Sánchez, R.; Nörtershäuser, W.

doi:10.1088/0953-4075/48/24/245008

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Isotope shift of ^40,42,44,48Ca in the 4s²S_1/2→4p²P_3/2 transition

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

Neugart , R.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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1507.07390v2
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Citation

Gorges, C., Blaum, K., Frömmgen, N., Geppert, C., Hammen, M., Kaufmann, S., et al. (2015). Isotope shift of ^40,42,44,48Ca in the 4s²S_1/2→4p²P_3/2 transition. Journal of Physics B: Atomic, Molecular and Optical Physics, 48(24): 245008. doi:10.1088/0953-4075/48/24/245008.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-0631-0

Abstract

We report on improved isotope shift measurements of the isotopes ^40,42,44,48Ca in the 4s²S_1/2→4p²P_3/2 transition using collinear laser spectroscopy. Accurately known isotope shifts in the 4s²S_1/2→4p²P_1/2 (D1) transition were used to calibrate the ion beam energy with an uncertainty of ΔU ≈ ± 0.25 V. The accuracy in the D2 transition was improved by a factor of 5–10. A King-plot analysis of the two transitions revealed that the field shift factor in the D2 line is about 1.8(13)% larger than in the D1 transition which is ascribed to relativistic contributions of the 4p_1/2 wave function.