A differential measurement of the ground state Lamb shift in hydrogenic germanium, Ge31

Abstract

The 1s-2p Lyman α transitions in hydrogenic germanium, Ge31+, have been observed in fourth order of diffraction from a beam-foil light source, simultaneously with the n = 2 to n = 4 Balmer β transitions observed in first order of diffraction. This enables a measurement of the Lyman α wavelengths using the Balmer β wavelengths as a calibration. The results are presented, along with a discussion of the experimental errors, and further work which should improve the accuracy with which the Lyman α. wavelengths can be determined. © 1988.