Formation of ultracold fermionic NaLi Feshbach molecules
Myoung-Sun HeoMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USATout T. WangDepartment of Physics, Harvard University, Cambridge, Massachusetts 02138, USACaleb A. ChristensenMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USATimur M. RvachovMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USADylan A. CottaDépartement de Physique, École Normale Supérieure de Cachan, 94235 Cachan, FranceJaehoon ChoiMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAYe-Ryoung LeeMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAWolfgang KetterleMIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2012en
ABI
Аннотация
We describe the formation of fermionic NaLi Feshbach molecules from an ultracold mixture of bosonic ${}^{23}$Na and fermionic ${}^{6}$Li. Precise magnetic field sweeps across a narrow Feshbach resonance at 745 G result in a molecule conversion fraction of $5%$ for our experimental densities and temperatures, corresponding to a molecule number of $5\ifmmode\times\else\texttimes\fi{}{10}^{4}$. The observed molecular decay lifetime is $1.3$ ms after removing free Li and Na atoms from the trap. Due to its extremely low reactivity, NaLi molecules in the ground state will have a much longer lifetime than KRb.
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