Sylvain Liberman (1934[1] – 5 August 1988) was a French physicist, specializing in atomic physics and laser spectroscopy.
His dissertation is entitled Études de structures hyperfines et d'effets isotopiques dans les raies laser infrarouges de gaz rares (Studies of hyperfine structures and of isotopic effects generated by infrared lasers in spectrographic lines of noble gases).
[5] Liberman was involved in the development of a single-mode pulsed laser with excellent pointing stability.
(Pointing stability is a measure (usually in mr or μr) of how much the laser beam position drifts from the target over time.)
[2][8] He also made contributions to the understanding of Rydberg states, spontaneous collective decays (superradiance, subradiance)[2][9] and the hyperfine interaction of radioactive atoms, which he and his colleagues investigated at CERN using the ISOLDE facility.