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Title: Isotope shifts in francium isotopes Fr 206 - 213 and Fr 221

We present the isotope shifts of the 7s 1/2 to 7p 1/2 transition for francium isotopes ²⁰⁶⁻²¹³Fr with reference to ²²¹Fr collected from two experimental periods. The shifts are measured on a sample of atoms prepared within a magneto-optical trap by a fast sweep of radio-frequency sidebands applied to a carrier laser. King plot analysis, which includes literature values for 7s 1/2 to 7p 3/2 isotope shifts, provides a field shift constant ratio of 1.0520(10) and a difference between the specific mass shift constants of 170(100) GHz amu between the D₁ and D₂ transitions, of sufficient precision to differentiate between ab initio calculations.
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Publication Date:
OSTI Identifier:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 90; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-06-22 19:48:52; Journal ID: ISSN 1050-2947
American Physical Society
Sponsoring Org:
Country of Publication:
United States