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We report the creation of ultracold bosonic dipolar$^{23}\textrm{Na}^{39}\textrm{K}$ molecules in their absolute rovibrationalground state. Starting from weakly bound molecules immersed in an ultracoldatomic mixture, we coherently transfer the dimers to the rovibrational groundstate using an adiabatic Raman passage. We analyze the two-body decay in a puremolecular sample and in molecule-atom mixtures and find an unexpectedly lowtwo-body decay coefficient for collisions between molecules and$^{39}\textrm{K}$ atoms in a selected hyperfine state. The preparation ofbosonic $^{23}\textrm{Na}^{39}\textrm{K}$ molecules opens the way for futurecomparisons between fermionic and bosonic ultracold ground-state molecules ofthe same chemical species.

An Ultracold Gas of Bosonic $^{23}\textrm{Na}^{39}\textrm{K}$ Ground-State Molecules