High-angular-momentum states in cold Rydberg gases |
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Authors: | Dutta S K Feldbaum D Walz-Flannigan A Guest J R Raithel G |
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Institution: | Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120, USA. |
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Abstract: | Cold, dense Rydberg gases produced in a cold-atom trap are investigated using spectroscopic methods and time-resolved electron counting. Optical excitation on the discrete Rydberg resonances reveals long-lasting electron emission from the Rydberg gas ( >20 ms). Our observations are explained by lm-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. |
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