The ZEKE-effect in cold Rydberg gases

Details The ZEKE-effect in cold Rydberg gases The ZEKE-effect in cold Rydberg gases

2000-03-31

arxiv.org/abs/physics/0003109v2

Physics

Atomic Physics

5 pages, 7 figures

Scientific paper

Cold, dense Rydberg gases produced in a cold-atom trap are investigated using spectroscopic methods and time-resolved electron counting. On the discrete Rydberg resonances we observe large trap losses and long lasting electron emission from the Rydberg gas (>30ms). Our observations are explained by quasi-elastic l-mixing collisions between Rydberg atoms and slow electrons that lead to the population of long-lived high-angular-momentum Rydberg states. These atoms thermally ionize slowly and with large probabilities, leading to the observed effects.

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