Neutron beam facility at the Louvain-La-Neuve isochronous cyclotron; cross sections for fast neutron production

The characteristics of the neutron beams are presented. Neutron production cross sections have been measured at 0 degrees and 20 degrees for (p,n) and ( alpha ,n) reaction on /sup 2/H, /sup 6/Li, /sup 7 /Li and /sup 9/Be thin targets using 50 MeV protons and 100 MeV alpha -particles, and for the (d,n) reaction on /sup 4/He target using 50 MeV deuterons.