  We present an estimate of the yield of hard probes expected for collisions of
the isobars $^{96}_{44}$Ru and $^{96}_{40}$Zr at collision energies reachable
at RHIC and the<EMAIL_ADDRESS>These yields are proportional to the number of binary
nucleon-nucleon interactions, which is characteristically different due to the
presence of the large neutron skin in $^{96}_{40}$Zr. This provides an
independent opportunity to measure the difference between the neutron skin of
$^{96}_{44}$Ru and $^{96}_{40}$Zr, which can provide an important constraint on
the Equation of State of cold neutron-rich matter.
