External-Field Shifts of the 199Hg+ Optical Frequency Standard
Abstract
Frequency shifts of the 199Hg+ 5d106s 2S1/2 (F = 0, MF = 0) to 5d96s2 2D5/2 (F = 2, MF = 0) electric-quadrupole transition at 282 nm due to external fields are calculated, based on a combination of measured atomic parameters and ab initio calculations. This transition is under investigation as an optical frequency standard. The perturbations calculated are the quadratic Zeeman shift, the scalar and tensor quadratic Stark shifts, and the interaction between an external electric field gradient and the atomic quadrupole moment. The quadrupole shift is likely to be the most difficult to evaluate in a frequency standard and may have a magnitude of about 1 Hz for a single ion in a Paul trap.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2000
- Accession Number
- ADA520322
Entities
People
- Wayne M. Itano
Organizations
- National Institute of Standards and Technology