Improved frequency measurement and isotope shift of the 4 d ⁹ 5 s ^{2   2} D _5/2 → 4 d ¹⁰ 6 p   ² P _3/2 transition in silver by laser heterodyne spectroscopy

Abstract:

The frequency of the center of gravity of the transition 4 d ⁹ 5 s ^{2   2} D _5/2 → 4 d ¹⁰ 6 p   ² P _3/2 in Ag I has been determined using laser heterodyne spectroscopy of a collimated thermal metastable atomic beam. We find the value ν = 547376425(12) MHz, five times more accurate than our earlier published result. For the isotope shift, we obtain ν(¹⁰⁹Ag)- ν(¹⁰⁷Ag)=-978.1(0.5) MHz, a ten-fold improvement over our previous measurement.