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Physical Review Letters

High Resolution Feshbach Spectroscopy of Cesium

Cheng Chin, Vladan Vuletić, Andrew J. Kerman, Steven Chu

Published Sep 25, 2000• 130 citations
Publisher

Abstract

We measure high-resolution Feshbach resonance spectra for ultracold cesium atoms colliding in different hyperfine and magnetic sublevels. More than 25 resonances are observed for magnetic fields up to 230 G and their positions are measured with an accuracy down to 0.03 G. From these spectra several ground-state molecular interaction parameters can be extracted with sufficient accuracy to permit for the first time an unambiguous and accurate determination of cesium's ultracold collision properties [P. J. Leo, C. J. Williams, and P. S. Julienne, following Letter, Phys. Rev. Lett. 85, 2721 (2000)].

DOI
10.1103/physrevlett.85.2717

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