Observation of Electric Quadrupole Transitions to Rydberg nd States of Ultracold Rubidium Atoms

Details Observation of Electric Quadrupole Transitions to Rydberg nd States of Ultracold Rubidium Atoms Observation of Electric Quadrupole Transitions to Rydberg nd States of Ultracold Rubidium Atoms

2008-09-13

arxiv.org/abs/0809.2341v1

Physics

Atomic Physics

7 pages, 5 figures, 1 table

Scientific paper

We report the observation of dipole-forbidden, but quadrupole-allowed, one-photon transitions to high Rydberg states in Rb. Using pulsed UV excitation of ultracold atoms in a magneto-optical trap, we excite $5s \to nd$ transitions over a range of principal quantum numbers $n=27-59$. Compared to dipole-allowed (E1) transitions from $5s \to np$, these E2 transitions are weaker by a factor of approximately 2000. We also report measurements of the anomalous $np_{3/2} : np_{1/2}$ fine-structure transition strength ratio for $n=28-75$. Both results are in agreement with theoretical predictions.

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