High Resolution Spectroscopy of the Hydrogen Atom: Determination of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>1</mn><mi mathvariant="italic">S</mi></math></span> Lamb Shift

S. Bourzeix; B. de Beauvoir; F. Nez; M. D. Plimmer; F. de Tomasi; L. Julien; F. Biraben; D. N. Stacey

doi:10.1103/PhysRevLett.76.384

High Resolution Spectroscopy of the Hydrogen Atom: Determination of the $1 S$ Lamb Shift

S. Bourzeix, B. de Beauvoir, F. Nez, M. D. Plimmer, F. de Tomasi, L. Julien, F. Biraben, and D. N. Stacey

Phys. Rev. Lett. 76, 384 – Published 15 January 1996

Abstract

We have measured the $1 S$ Lamb shift by comparing the frequencies of the ${1 S}_{1 / 2} - {3 S}_{1 / 2}$ and ${2 S}_{1 / 2} - {6 S}_{1 / 2}$ or ${2 S}_{1 / 2} - {6 D}_{5 / 2}$ two-photon transitions. Our result is 8172.798 (46) MHz. It is the most precise yet reported and is consistent with the larger existing proton radius measurement of $r_{p} = 0.862 (12) fm$ .

Received 1 August 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.384

Authors & Affiliations

S. Bourzeix, B. de Beauvoir, F. Nez, M. D. Plimmer, F. de Tomasi, L. Julien, and F. Biraben

Laboratoire Kastler Brossel, Ecole Normale Supérieure and Université Pierre et Marie Curie, Laboratoire associé au CNRS URA18, 4 place Jussieu, Tour 12 E01, 75252 Paris Cedex 05, France

D. N. Stacey