We report on the production of a degenerate Fermi gas of ⁵³Cr atoms, polarized in the state F=9/2, mF=-9/2, by sympathetic cooling with bosonic S=3,0.16em0exmS=-3 ⁵²Cr atoms. We load in an optical dipole trap 3×10⁴⁵³Cr atoms with 10⁶ ⁵²Cr atoms. Despite the initial small number of fermionic atoms, we reach a final temperature of T0.6×Tf (Fermi temperature), with up to 10³ ⁵³Cr atoms. This surprisingly efficient evaporation stems from an interisotope scattering length |aBF|=80(±10)aB (Bohr radius) which is small enough to reduce evaporative losses of the fermionic isotope, but large enough to assure thermalization.
No takes yet. Share an insight, caveat, or question.
Naylor et al. (2015) studied this question.