Isotope shifts in francium isotopes Fr-213206 and 221Fr
Abstract
We present the isotope shifts of the 7 s1 /2 to 7 p1 /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 7 s1 /2 to 7 p3 /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.
- Publication:
-
Physical Review A
- Pub Date:
- November 2014
- DOI:
- 10.1103/PhysRevA.90.052502
- Bibcode:
- 2014PhRvA..90e2502C
- Keywords:
-
- 32.10.Fn;
- 31.30.Gs;
- 37.10.Jk;
- 42.62.Fi;
- Fine and hyperfine structure;
- Hyperfine interactions and isotope effects Jahn-Teller effect;
- Atoms in optical lattices;
- Laser spectroscopy