High-resolution isotope-shift spectroscopy of Cd I

Abstract

We present absolute frequency measurements of the ${}^1{\text{P}}_1\leftarrow {}^1{\text{S}}_0$ ($229$nm) and ${}^3{\text{P}}_1\leftarrow {}^1{\text{S}}_0$ ($326$nm) transitions for all naturally occurring isotopes of cadmium. The isotope shifts and hyperfine intervals of the fermionic isotopes are determined with an accuracy of 3.3MHz. We find that quantum interference in the laser-induced fluorescence spectra of the ${}^1{\text{P}}_1\leftarrow {}^1{\text{S}}_0$ transition causes an error of up to 29(5)MHz in determining the hyperfine splitting, when not accounted for with an appropriate model. Using a King-plot analysis, we extract the field- and mass-shift parameters and determine nuclear charge radius differences for the fermions. The lifetime of the ${}^1{\text{P}}_1$ state is determined to be 1.60(5)ns by measuring the natural linewidth of the ${}^1{\text{P}}_1\leftarrow {}^1{\text{S}}_0$ transition. These results resolve significant discrepancies among previous measurements.

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Cited by in corpus (5)

• Isotope Shifts in Cadmium as a Sensitive Probe for Physics Beyond the Standard Model
• Hyperfine structure and isotope shifts of the ${}^1{P}_1\leftarrow {}^1{S}_0$ transition in atomic zinc
• High-resolution spectroscopy of barium monofluoride: Odd isotopologues, hyperfine structure and isotope shifts
• Magnetic hyperfine structure constants of ${}^{137}$BaF in the ${}^2{\Pi }_{1/2}$ and ${}^2{\Pi }_{3/2}$ excited states
• Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations