Observation of Feshbach Resonances in an Ultracold Gas of 52Cr

Published

May 9, 2005

Author(s)

J Werner, A Griesmaier, S Hensler, J Stuhler, Tilman Pfau, Andrea Simoni, Eite Tiesinga

Abstract

We have observed Feshbach resonances in elastic collisions between ultracold 52Cr atoms. This is the first observation of collisional Feshbach resonances in an atomic species with more than one valence electron. The zero nuclear spin of 52Cr and thus the absence of a Fermi-contact interaction leads to regularly-spaced resonancesequences. By comparing resonance positions with multi-channel scattering calculations we determine the s-wave scattering length of the lowest ^2S+1}\Sigma_g^+ potentials to be 112(14) a_0, 58(6) a_0 and -7(20) a_0 for S=6, 4, and 2, respectively, where a_0=0.0529 nm. The number in parenthesis is the one-standard deviation uncertainty.

Citation

Physical Review Letters

Volume

94

Issue

18

Pub Type

Journals

Keywords

atom-atom collisions, chromium, dipole-dipole interaction, Feshbach resonances

Citation

Werner, J. , Griesmaier, A. , Hensler, S. , Stuhler, J. , Pfau, T. , Simoni, A. and Tiesinga, E. (2005), Observation of Feshbach Resonances in an Ultracold Gas of ⁵²Cr, Physical Review Letters (Accessed October 11, 2025)