Key points are not available for this paper at this time.
This paper gives a review of the Doppler-free two-photon experiments performed since the beginning of the 1970s until the end of the 1990s. The Doppler-free two-photon method was first tested on the sodium atom, then used extensively to study the hydrogen atom and measure the Rydberg constant and the Lamb shifts.
F. Biraben (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: