Spallation neutron spectra measurements Part I: Time-of-flight technique

We present an experimental method based on a time-of-flight technique between the tagged incident particles and a thick liquid NE213 scintillator to measure neutron energy spectra from 3 to 400 MeV at the Saturne synchrotron of Saclay. Efficiency measurements are made using a pulsed neutron source from the Tandem Van de Graaff of Bruyères-le-Châtel at low energies and a quasi-monoenergetic neutron beam at Saturne up to 50 MeV.