Noble Gas Broadening and Shift of Doppler-Free Two-Photon Lines of Rubidium

K. H. Weber, Kay Niemax

K. H. Weber, Kay Niemax

Ravinder Kachru, THOMAS W. MOSSBERG, Sven R. Hartmann

Noble-gas-induced relaxation of photon echo signals is used to determine the broadening rates of the Na D lines. Since echo signals are 'Doppler free', precision measurements are possible at low perturber-gas pressures (<or=1 Torr), and are sensitive to the previously inaccessible central lineshape. Interestingly, the authors results disagree with other recently published broadening rates. The equivalence of linewidth measurements and echo measurements on transitions between states of low electronic angular momentum is discussed.

F. Biraben, Bernard Cagnac, E. Giacobino +1 more

Investigates experimentally the broadening and the shift of the sodium 3S-4D and 3S-5S two-photon transitions without Doppler broadening by collisions with the noble gases. The broadening cross section is larger for the 3S-5S transition than for the 3S-4D transition. The experimental values for the 3S-5S transition are compared with semiclassical calculations using the van der Waals potential and the potentials calculated by Pascale and Vandeplanque (1974).

James H. Stanley, R. Seth Smith

Douglas M. Bruce, M. Y. Mirza, W. W. Duley