Fig. 1
From: Comparative study of the effects of different radiation qualities on normal human breast cells
Relative energy distributions of the four different neutron fields. a Low-energy monoenergetic neutrons of 0.56 MeV; b Low-energy monoenergetic neutrons of 1.2 MeV; c Medium-energy neutrons with a broad energy distribution and a mean neutron energy of <E n > = 5.8 MeV; d Mixed gamma - secondary neutron field with a mean neutron energy of <E n > = 70.5 MeV, produced by a 190 MeV proton beam impinging on a water phantom