Fig. 9From: Neutron production in the lunar subsurface from alpha particles in galactic cosmic rays(a) Neutron density profiles in the case of the GCR spectra reported by the BESS balloon experiment. (b) Comparison of neutron density profiles calculated using the GCR spectra by BESS with the experimental data reported by Woolum et al. (1975). The experimental data are multiplied by a factor of 1.3 to take into account the systematic error of 30%.Back to article page