  Spatial correlations are observed in an ultracold gas of fermionic atoms
close to a Feshbach resonance. The correlations are detected by inducing
spin-changing rf transitions between pairs of atoms. We observe the process in
the strongly interacting regime for attractive as well as for repulsive
atom-atom interactions and both in the regime of high and low quantum
degeneracy. The observations are compared with a two-particle model that
provides theoretical predictions for the measured rf transition rates.
