Figure 1: Variation with neutron energy and location in the phantom of neutron dose-mean lineal energy and saturation corrected dose mean lineal energy.
From: The origin of neutron biological effectiveness as a function of energy

Dose-mean lineal energy (a) and saturation-corrected dose-mean lineal energy for saturation parameter y0 = 100 (b), 150 (c) and 200 keV/μm (d) for neutrons as a function of their initial energy in the three scoring regions in the phantom. Error bars are standard deviations among different PHITS runs and are always within the symbols. Lines are drawn to guide the eye.