Noble-gas-induced collisional line broadening of atomic-lithium Rydberg superposition states 2S-nS and 2S-nD (n = 4 to 30) measured by trilevel echoes
The pioneering research of Fuchtbauer et al. on Na-3S-nP transition broadening by Ar gas demonstrated that the collisional-broadening cross section increases sharply for an increasing principal quantum number n for low n, peaks as n approaches the Rydberg regime, and then decreases to a small function of its maximum value. It appears to reach an asymptotic value (independent of n) in the high-n regime. This behavior has been corroborated by several other experimental efforts. 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. Keywords: Optical coherent transients; Two photon excitation; Sodium vapor.
- Research Organization:
- Columbia Univ., New York (USA). Columbia Radiation Lab.
- OSTI ID:
- 5412985
- Report Number(s):
- AD-A-168032/1/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Two-photon trilevel echo and SHG in 3D-3S transition of Na and total collisional cross-section measurement in 2P-2S transition of Li
Measurement of collisional relaxation of rydberg 3S-nS(nD) and 3P1/2-3P3/2 transitions of Na by trilevel echoes and collisional velocity changes of Na (3S and 3P/sub 1/2/ states) by stimulated echo
Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ARGON
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
EIGENVALUES
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
LINE BROADENING
LITHIUM
MASSLESS PARTICLES
METALS
MULTI-PHOTON PROCESSES
NONMETALS
OPTICAL PROPERTIES
PHOTONS
PHYSICAL PROPERTIES
RARE GASES
RYDBERG STATES
TRANSIENTS