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Collisional Stability of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="bold">K</mml:mi><mml:mprescripts /><mml:none /><mml:mn>40</mml:mn></mml:mmultiscripts></mml:math>Immersed in a Strongly Interacting Fermi Gas of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:mprescripts /><mml:none /><mml:mn>6</mml:mn></mml:mmultiscripts></mml:math>
We investigate the collisional stability of a sample of $^{40}\mathrm{K}$ atoms immersed in a tunable spin mixture of $^{6}\mathrm{Li}$ atoms. In this three-component Fermi-Fermi mixture, we find very low loss rates in a wide range of interactions as long as molecule formation of $^{6}\mathrm{Li}$ is avoided. The stable fermionic mixture …