Precision Measurement of the Hydrogen-Deuterium 1S-2S Isotope Shift

Christian G. Parthey
Arthur Matveev
Janis Alnis
Randolf Pohl
Thomas Udem
Ulrich D. Jentschura, Missouri University of Science and Technology
Nikolai Kolachevsky
Theodor W. Hänsch

This document has been relocated to http://scholarsmine.mst.edu/phys_facwork/307

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Abstract

Measuring the hydrogen-deuterium isotope shift via two-photon spectroscopy of the 1S-2S transition, we obtain 670994334606(15) Hz. This is a 10-times improvement over the previous best measurement confirming its frequency value. a calculation of the difference of the mean square charge radii of deuterium and hydrogen results in r2d-r2 p=3.82007(65)fm2, a more than twofold improvement compared to the former value.