Physical Review A
The Lamb shift of a hydrogenic ion can be deduced from the anisotropy in the angular distribution of the 2s12-1s12 electric field quenching radiation. The accuracy of our previous anisotropy measurement for deuterium is improved to about ± 150 ppm. The derived Lamb shift is (1059.36±0.16) MHz. The sources of error are carefully analyzed and the prospects for further improvements in the accuracy are discussed. © 1978 The American Physical Society.
Van Wijngaarden, A. and Drake, Gordon W. F.. (1978). Deuterium Lamb shift via quenching-radiation anisotropy measurements. Physical Review A, 17 (4), 1366-1374.