We create weakly bound bosonic 23Na39K molecules in a mixture of ultracold Na23 and K39. The creation is done in the vicinity of a so far undetected Feshbach resonance at about 196 G which we identify in this work by atom-loss spectroscopy. We investigate the involved molecular state by performing destructive radio-frequency binding-energy measurements. For the constructive molecule creation we use radio-frequency pulses with which we assemble up to 6000 molecules. We analyze the molecule creation efficiency as a function of the radio-frequency pulse duration and the atom number ratio between Na23 and K39. We find an overall optimal efficiency of 6% referring to the K39 atom number. The measured lifetime of the molecules in the bath of trapped atoms is about 0.3 ms.
Formation of ultracold weakly bound dimers of bosonic 23Na39 K
Zenesini A.;
2020
Abstract
We create weakly bound bosonic 23Na39K molecules in a mixture of ultracold Na23 and K39. The creation is done in the vicinity of a so far undetected Feshbach resonance at about 196 G which we identify in this work by atom-loss spectroscopy. We investigate the involved molecular state by performing destructive radio-frequency binding-energy measurements. For the constructive molecule creation we use radio-frequency pulses with which we assemble up to 6000 molecules. We analyze the molecule creation efficiency as a function of the radio-frequency pulse duration and the atom number ratio between Na23 and K39. We find an overall optimal efficiency of 6% referring to the K39 atom number. The measured lifetime of the molecules in the bath of trapped atoms is about 0.3 ms.File | Dimensione | Formato | |
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PhysRevA.101.042704.pdf
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