Author ORCID Identifier

W. D. Williams: 0000-0001-8446-8329

Document Type

Article

Publication Date

9-1-2024

Publication Title

Physical Review A

Abstract

We report on the absolute energy of the 2⁢��⁢3⁢��⁢1⁢��0 state in neutral 9Be. In doing so, we measure the transition frequencies of the 2⁢��2⁢1⁢��0→ 2⁢��⁢2⁢��⁢1⁢��∘1 and 2⁢��⁢2⁢��⁢1⁢��∘1→ 2⁢��⁢3⁢��⁢1⁢��0 transitions, also determining the absolute energy of the 2⁢��⁢2⁢��⁢1⁢��∘1 state. The results are obtained from a home-built hollow cathode discharge lamp using saturated absorption spectroscopy with laser frequencies referenced to a frequency comb. The transition frequencies are determined to be 1276080080⁢(50) and 363105650⁢(130) MHz for the 2⁢��2⁢1⁢��0→ 2⁢��⁢2⁢��⁢1⁢��∘1 and 2⁢��⁢2⁢��⁢1⁢��∘1→ 2⁢��⁢3⁢��⁢1⁢��0 transitions, respectively. The absolute energies are determined to be 42565.4498⁢(17) and 54677.350⁢(5) cm−1 for the 2⁢��⁢2⁢��⁢1⁢��∘1 and 2⁢��⁢3⁢��⁢1⁢��0 states, respectively. The results confirm recent theoretical calculations that included ��6 (QED) corrections. All experimental results are limited by unresolved hyperfine structure.

Volume

110

Issue

3

DOI

10.1103/PhysRevA.110.032818

ISSN

24699926

Version

Version of Record

Comments

Archived as published.

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