Determination of the s-wave Scattering Length of Chromium

Abstract

We have measured the deca-triplet s-wave scattering length of the bosonic chromium isotopes ${}^{52}$Cr and ${}^{50}$Cr. From the time constants for cross-dimensional thermalization in atomic samples we have determined the magnitudes $|a{(}^{52}Cr)|=(170\pm 39)a_0$ and $|a{(}^{50}Cr)|=(40\pm 15)a_0$, where $a_0=0.053nm$. By measuring the rethermalization rate of ${}^{52}$Cr over a wide temperature range and comparing the temperature dependence with the effective-range theory and single-channel calculations, we have obtained strong evidence that the sign of $a{(}^{52}Cr)$ is positive. Rescaling our ${}^{52}$Cr model potential to ${}^{50}$Cr strongly suggests that $a{(}^{50}Cr)$ is positive, too.

arXiv commentv3: corrected typo in y-axis scaling of Figs. 3 and 4

References in corpus (8)

• Bose-Einstein Condensation of Atomic Hydrogen
• Tuning the dipolar interaction in quantum gases
• Bose-Einstein condensation with magnetic dipole-dipole forces
• Feshbach resonances in rubidium 87: Precision measurement and analysis
• Ultracold dipolar gases - a challenge for experiments and theory
• Collisional properties of ultracold K-Rb mixtures
• Collisional relaxation in diffuse clouds of trapped bosons
• Doppler cooling of an optically dense cloud of trapped atoms

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