Double-Quantum Saturation Spectroscopy in Hydrogen: Measurement of the $3 P_{\frac{3}{2}} - 3 D_{\frac{3}{2}}$ Lamb Shift

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2 October 1978

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

Vol. 41 (14) , 940-944
https://doi.org/10.1103/physrevlett.41.940

Abstract

Very narrow saturated double-quantum transitions (

2 {}^{2}S - 3 {}^{2}S, 3 {}^{2}D

) have been observed for atomic H in a He-

H_{2}

dc discharge using rf and a cw dye laser. The H

3 P_{\frac{3}{2}} - 3 D_{\frac{3}{2}}

Lamb shift has been measured directly by comparing single- and double-quantum saturation signals to be - 5.5(0.9) MHz, confirming that

3 D_{\frac{3}{2}}

lies lower than the

3 P_{\frac{3}{2}}

state. Further applications of the method are discussed.

Keywords

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