Low Energy Neutron Emission after Muon Capture

The Mu2e experiment at Fermilab seeks to observe charge lepton flavor violation through neutrino-less muon to electron conversion after muons are stopped and captured in an aluminum target. The 3E-17 single event sensitivity of the experiment requires unprecedented reduction of backgrounds due to neutrons, protons, and gammas. Thus to better quantify the potential neutron background the AlCap collaboration measured neutron emission after muons are stopped on an Al target using the πE5 beamline at the Paul Scherrer Institute. This talk will present results on the characterization of the emitted neutron energy spectra between 2 to 11 MeV for Al and Ti targets.