Physical Review A
We report absolute frequency measurements on the level of neutral using sub-Doppler two-photon spectroscopy. The absolute center-of-gravity energy for the level is determined to be , a factor of 170 times improvement over the previous measurement from 1964 of . This measurement also corrects a discrepancy with the previously measured value. The hyperfine coefficients were found to be and , which are consistent with previous results.
©2021 American Physical Society
Herd, M. T.; Cook, E. C.; and Williams, William, "Absolute Frequency Measurement of the lLevel of Neutral Using Two-Photon Spectroscopy" (2021). Physics: Faculty Publications, Smith College, Northampton, MA.