Document Type

Article

Publication Date

10-1-2021

Publication Title

Physical Review A

Abstract

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.

Volume

104

Issue

4

DOI

10.1103/PhysRevA.104.042812

ISSN

24699926

Rights

©2021 American Physical Society

Comments

Archived as published.

Included in

Physics Commons

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