Remeasurement of the Lamb Shift in D,n=2

The Lamb shift in the $n=2\mathrm{}$ level of deuterium has been measured by locating the crossing point of the levels $2{}_{}{}^2{}_{}{}^{}S_{\frac{1}{2}}^{}{}_{}{}^{}(m_J=-\frac{1}{2})$ and $2{}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}(m_J=+\frac{1}{2})$ near 574 G. An atomic beam in the metastable $2{}_{}{}^2{}_{}{}^{}S_{\frac{1}{2}}^{}{}_{}{}^{}$ s$\stackrel{\mathrm{´}}{\mathrm{t}}$ate was prepared, having a single hyperfine structure component. This beam then traveled into a magnetic field where a static electric field was used to induce transitions to the $2{}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}(m_J=+\frac{1}{2})$ state. Transitions utilizing two different hyperfine components were measured, and yielded two independent values of the Lamb shift. Eleven corrections to the data are discussed in some detail. The final value for the Lamb shift is ${\mathcal{S}}_D=1059.\mathrm{}24\pm 0.10$ MHz. This result disagrees slightly with the original measurement of Lamb et al., but does agree with the most recent theoretical result.