title: A simple representation of spallation neutron energy spectra for 'back of the envelope' estimates.
abstract: A simple approximate easy-to-use analytic formula is suggested for the absolute integrated-over-angle energy spectrum of neutrons from a high-Z spallation neutron target driven by 500-1500MeV proton beams. Overall, the formula is probably reliable to within a factor ~2-3, and could be useful for quickly making rough 'back of the envelope' estimates.
authors.affiliation: ISIS, STFC, Rutherford Appleton Laboratory, Oxfordshire, OX11 0QX, UK.
authors.forename: D J S
authors.initials: DJ
authors.lastname: Findlay