Physical Review A
We report an absolute frequency measurement of the 2s3d 1 D2 state in neutral 9Be using two-photon spectroscopy with a resonant intermediate state. The absolute center-of-gravity energy is determined to be 64 428.40 321(55) cm−1, a factor of 180 more precise than the previous experimental measurement. We also confirm our previous result for the energy of the intermediate 2s2p 1 P1 level. Precision is limited by unresolved hyperfine structure and the complications of performing resonant two-photon spectroscopy on an atomic beam. A three-level rate-equation analysis is presented to explore, and minimize, systematic uncertainties arising from small deviations of the angle between the atomic and optical beams off-perpendicular.
©2020 American Physical Society
Cook, Eryn C.; Vira, Alisha D.; and Williams, William, "Resonant Two-Photon Spectroscopy of the 2s3d 1D2 level of neutral 9Be" (2020). Physics: Faculty Publications, Smith College, Northampton, MA.