Cold 52Cr elastic and inelastic collision-rate determination using evaporative cooling analysis

Abstract

Elastic and inelastic collision-rate constants of 52Cr in the temperature range of 20 mK to 1 K are inferred from the evaporative cooling of buffer gas loaded atomic chromium. Using a model that describes the dynamics of the trapped chromium cloud during evaporation, we find gel= 2.15 +2.5,−1.2 10−10 cm3 / s and gin = 1.36 +1.2,−0.7 10−12 cm3 / s, consistent with theory but in disagreement with previously reported measurements.