We report continuous direct photoassociative formation of ultracold KRb molecules in the lowest vibrational levels (v"=0−10) of the electronic ground state (X1Σ+), starting from 39
Nearby in the stack
K and
85
Rb atoms in a magneto-optical trap. The process exploits a newfound resonant coupling between the
2(1),v′=165
and
4(1),v′=61
levels, which exhibit an almost equal admixture of the uncoupled eigenstates. The production rate of the