Collisional relaxation of 2S-nS and 2S-nD superposition states in atomic Li vapor is measured with the trilevel photon-echo technique. Principal quantum numbers range from n = 4 to well into the Rydberg regime with n = 30. For the rare-gas perturbers (He, Ne, Ar, Kr, and Xe) the variation of collisional cross section with n is considerably weaker than that previously found with Na vapor.
© 1986 Optical Society of America
Emily Y. Xu, F. Moshary, and S. R. Hartmann, "Noble-gas-induced collisional line broadening of atomic lithium Rydberg superposition states 2S-nS and ZS-nD (n = 4 to 30) measured by trilevel echoes," J. Opt. Soc. Am. B 3, 497-505 (1986)