Determination of the Hyperfine Structure in the $A {}^{2}Σ_{\frac{1}{2}}^{+}$ State of OH by Frequency-Doubled Dye-Laser Radiation

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2 July 1979

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 43 (1) , 29-32
https://doi.org/10.1103/physrevlett.43.29

Abstract

The hyperfine structure of OH in the

A {}^{2}Σ_{\frac{1}{2}}^{+}

state has been measured by exciting a molecular beam with cw intracavity frequency-doubled dye-laser radiation. The splittings are 778 MHz for

N^{'} = 0 and 200 to 500

MHz for

1 <~ N^{'} <~ 5

. The values for the hyperfine and

ρ

doubling are

b + \frac{1}{3} c = 777.8 \pm 2.0

MHz,

c = 165.8 \pm 2.8

MHz, and

γ = 7.13 \pm 0.03

GHz. Also the hyperfine splitting of OD in the

N^{'} = 0

state has been measured yielding

b + \frac{1}{3} c = 119 \pm 2

MHz.

Keywords

HYPERFINE STRUCTURE

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