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A search for TeV - PeV muon neutrinos from unresolved sources was performedon AMANDA-II data collected between 2000 and 2003 with an equivalent livetimeof 807 days. This diffuse analysis sought to find an extraterrestrial neutrinoflux from sources with non-thermal components. The signal is expected to have aharder spectrum than the atmospheric muon and neutrino backgrounds. Since noexcess of events was seen in the data over the expected background, an upperlimit of E^{2}\Phi_{90% C.L.} < 7.4 x 10^{-8} GeV cm^{-2} s^{-1} sr^{-1} isplaced on the diffuse flux of muon neutrinos with a \Phi \propto E^{-2}spectrum in the energy range 16 TeV to 2.5 PeV. This is currently the mostsensitive \Phi \propto E^{-2} diffuse astrophysical neutrino limit. We also setupper limits for astrophysical and prompt neutrino models, all of which havespectra different than \Phi \propto E^{-2}.

Multi-year search for a diffuse flux of muon neutrinos with AMANDA-II