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View article: 2S-4S spectroscopy in hydrogen atom: The new value for the Rydberg constant and the proton charge radius
2S-4S spectroscopy in hydrogen atom: The new value for the Rydberg constant and the proton charge radius Open
The core of the "proton radius puzzle" is the discrepancy of four standard deviations between the proton root mean square charge radii (rp) determined from regular hydrogen (H), and the muonic hydrogen atom (μp). We have measured the 2S-4P…
View article: Active fiber-based retroreflector providing phase-retracing anti-parallel laser beams for precision spectroscopy
Active fiber-based retroreflector providing phase-retracing anti-parallel laser beams for precision spectroscopy Open
We present an active fiber-based retroreflector providing high quality phase-retracing anti-parallel Gaussian laser beams for precision spectroscopy of Doppler sensitive transitions. Our design is well-suited for a number of applications w…
View article: Deuteron charge radius from spectroscopy data in atomic deuterium
Deuteron charge radius from spectroscopy data in atomic deuterium Open
We give a pedagogical description of the method to extract the charge radii and Rydberg constant from laser spectroscopy in regular hydrogen (H) and deuterium (D) atoms, that is part of the CODATA least-squares adjustment (LSA) of the fund…