Progress at NIST in measuring the D-lines of Li isotopes using an optical frequency synthesizer

Academic Article


  • Precise spectroscopic experiments with light atoms can provide information about nuclear properties that are very difficult to obtain in electron scattering experiments. For example, relative nuclear radii of low-Z isotopes can be determined accurately from isotope shifts. Theory has attained sufficient accuracy to study exotic, short-lived halo nuclei by interpreting precise spectroscopic measurements. However, serious inconsistencies remain in the measured isotope shifts for the D1 and D2 lines of the stable isotopes ( 6Li and 7Li). The latest experiments, within the last decade, are in strong disagreement with each other and with theory. We report on the progress of a new experiment at the National Institute of Standards and Technology (NIST) to measure these lithium D lines using an optical frequency comb. A preliminary result for the splitting isotope shift (SIS) is presented.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Simien CE; Brewer SM; Tan JN; Gillaspy JD; Sansonetti CJ
  • Start Page

  • 59
  • End Page

  • 62
  • Volume

  • 89
  • Issue

  • 1