  The negative-muon capture reaction (MCR) on the enriched $^{100}Mo$ isotope
was studied for the first time to investigate neutrino nuclear response for
neutrino-less double beta decays and supernova neutrino nuclear interactions.
MCR on $^{100}Mo$ proceeds mainly as $^{100}Mo(mu,xn)^{100-x}Nb$ with $x$ being
the number of neutrons emitted from MCR. The Nb isotope mass distribution was
obtained by measuring delayed gamma-rays from radioactive $^{100-x}Nb$. By
using the neutron emission model after MCR, the neutrino response (the strength
distribution) for MCR was derived. Giant resonance (GR)-like distribution at
the peak energy around 11-14 MeV, suggests concentration of the MCR strength at
the muon capture GR region.
