Determination of the Hydrogenic-Carbon Lamb Shift via <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mrow><msub><mrow><mi>S</mi></mrow><mrow><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac></mrow></msub></mrow></math></span> Metastable Quenching

D. E. Murnick; M. Leventhal; H. W. Kugel

doi:10.1103/PhysRevLett.27.1625

Determination of the Hydrogenic-Carbon Lamb Shift via $2 S_{\frac{1}{2}}$ Metastable Quenching

D. E. Murnick, M. Leventhal, and H. W. Kugel

Phys. Rev. Lett. 27, 1625 – Published 13 December 1971

Abstract

We have measured the Lamb shift in the $n = 2$ state of hydrogenic carbon-12. The result is 780.1 ± 8.0 GHz as compared with the quantum-electrodynamic calculation of 783.7 ± 0.24 GHz. The ratio of the electron-pickup cross section to the $2 S_{\frac{1}{2}}$ metastable state to the total electron-pickup cross section has also been determined as 0.022 ± 0.010 in argon at 25 MeV.