Ionization in a frozen Rydberg gas with attractive or repulsive potentials

Details Ionization in a frozen Rydberg gas with attractive or repulsive potentials Ionization in a frozen Rydberg gas with attractive or repulsive potentials

2008-06-20

arxiv.org/abs/0806.3402v1

Physics

Atomic Physics

4 pages

Scientific paper

We report clear evidence of the role of dipole-dipole interaction in Penning ionization of Rydberg atoms, leading to the formation of an ultracold plasma. Penning ionization of np Rydberg Cesium atoms is prevented for states with in n < 42, which correspond to a repulsive potential, but it does not occur for n larger than 42, corresponding to an attractive potential. Blackbody radiation is mostly responsible for the background and initial ionization, although ion-Rydberg collisions and population transfer due to limited superradiance may have to be considered.

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