{"paper":{"title":"Isotope shift of $^{40,42,44,48}$Ca in the $4s\\,^2 \\rm{S}_{\\frac{1}{2}} \\rightarrow 4p\\,^2\\rm{P}_{\\frac{3}{2}}$ transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. Krieger, C. Gorges, Ch. Geppert, J. Kr\\\"amer, K. Blaum, M. Hammen, N. Fr\\\"ommgen, R. Neugart, R. Sanchez, S. Kaufmann, W. N\\\"ortersh\\\"auser","submitted_at":"2015-07-27T12:56:02Z","abstract_excerpt":"We report on improved isotope shift measurements of the isotopes $^{40,42,44,48}$Ca in the $4s\\,^2 \\rm{S}_{\\frac{1}{2}} \\rightarrow 4p\\,^2\\rm{P}_{\\frac{3}{2}}$ (D2) transition using collinear laser spectroscopy. Accurately known isotope shifts in the $4s\\,^2 \\rm{S}_{\\frac{1}{2}} \\rightarrow 4p\\,^2\\rm{P}_{\\frac{1}{2}}$ (D1) transition were used to calibrate the ion beam energy with an uncertainty of $\\Delta U \\approx \\pm 0.25$ 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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07390","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}