Measurement of the Lamb Shift in Hydrogenic <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Cl</mi></mrow><mrow><mn>1</mn><mn>6</mn><mo>+</mo></mrow></msup></mrow></math></span>

O. R. Wood, II; C. K. N. Patel; D. E. Murnick; E. T. Nelson; M. Leventhal; H. W. Kugel; Y. Niv

doi:10.1103/PhysRevLett.48.398

Measurement of the Lamb Shift in Hydrogenic ${Cl}^{16 +}$

O. R. Wood, II, C. K. N. Patel, D. E. Murnick, E. T. Nelson, M. Leventhal, H. W. Kugel, and Y. Niv

Phys. Rev. Lett. 48, 398 – Published 8 February 1982

Abstract

The Lamb-shift splitting in hydrogenic chlorine is measured to be 31.19(22) THz. The experiment was performed on a relativistic beam of chlorine ions using a C $O_{2}$ laser resonance method. The result agrees with one of the two existing calculations and is the most sensitive test to date of QED in high- $Z$ systems.