Abstract

High-resolution photoassociation spectroscopy is reported using a modulation spectroscopy technology in a cesium atomic magneto-optical trap. The two lowest vibrational levels have been experimentally observed which have been theoretically predicted in [Phys. Rev. A 75 052501 (2007)]. A new potential curve is obtained by using the Rydberg—Klein—Ress method with a well depth of −82.384 ± 0.026 cm−1, which is deeper than the result of previous experiment (−77.909 cm−1) and the theoretical prediction (−81.6445 cm−1).

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