Results 151 to 160 of about 396,987 (209)

Ionization of Rydberg atoms

Physical Review A, 1986
Ion formation in sodium vapor (\ensuremath{\sim}${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium, ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$, and Na(3s) were observed.
C. E. Burkhardt   +5 more
openaire   +3 more sources

Resonant Rydberg-Atom-Rydberg-Atom Collisions

Physical Review Letters, 1981
We have observed the sharply resonant enhancement of the cross section of the collision process $ns+ns\ensuremath{\rightarrow}np+(n\ensuremath{-}1)p$ between two $\mathrm{Na}ns$ ($16l~nl~27$) atoms which occurs when the levels are shifted by an electric field so that the $ns$ level lies midway between the two $p$ states.
K. A. Safinya   +4 more
openaire   +1 more source

Subrecoil cooling of Rydberg atoms

Physical Review A, 1995
Two mechanisms for production of an ensemble of atoms in a highly excited state with very narrow distribution of the atomic center-of-mass momentum (cold Rydberg atoms) are proposed. The mechanisms are based on velocity-selective $\ensuremath{\pi}$ pulses and coherent population trapping in three-level cascade systems with the uppermost state being the
, Korsunsky, , Rozhdestvensky
openaire   +2 more sources

Squeezing in a Rydberg Atom Maser

Physical Review Letters, 1985
We show theoretically that a Rydberg atom maser produces during its evolution a squeezed field with sub-Poissonian statistics. We give a semiclassical interpretation of this effect.
, Heidmann, , Raimond, , Reynaud
openaire   +2 more sources

Radiative Rydberg-atom–Rydberg-atom collisions in the strong-field regime

Physical Review A, 1987
We describe the experimental observation of the resonant collisional energy transfer Na(ns)+Na(ns)+qh\ensuremath{\nu}\ensuremath{\rightarrow}Na(np)+Na[(n-1)p]+(q○)h\ensuremath{\nu} which occurs when the Na atoms in a strong microwave field are tuned in energy with a static field so that the energy resonance ${E}_{\mathrm{ns}}$+${E}_{\mathrm{ns}}$=${E}_{
, Pillet   +4 more
openaire   +2 more sources

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