External-Field Shifts of the ~(199)Hg~(+) Optical Frequency Standard

摘要

Frequency shifts of the ~(199)Hg~(+) 5d~(10)6s~(2)S_(1/2)(F=0,M_F=0)to 5d~(9)6s~(2) ~(2)D_(5/2)(F=2,M_(F)=0) electric-quadrupole transition at 282 nm due to external fields are 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 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 gradi-ent 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