Cross section measurements at neutron energies 71 and 112 MeV and energy integrated cross section measurements (0.1 < En < 750 MeV) for the neutron induced reactions O(n,x)10Be, Si(n,x)10Be, and Si(n,x)26Al

The cross sections for the reactions O(n,x)Be-10, Si(n,x)Be-10, and Si(n,x)Al-26 were measured at neutron energies 71 and 112 MeV. The neutron cross sections for O(n,x)10Be are higher than the corresponding proton cross sections at 70-110 MeV and the neutron induced cross section for Si(n,x)Be-10 at 112 MeV is slightly higher than the corresponding proton cross section. Cross sections for the production of Al-26 from Si are similar to those from protons at low energies (<40 MeV) while at higher energies the measured neutron cross sections for Si(n,x)Al-26 are lower than the corresponding proton cross sections. Energy integrated (average) cross sections for these reactions were measured using 'white' neutron beams (0.1 < E-n < 750 MeV). The Al-26/Be-10 production rate ratio from SiO2 measured using 'white' neutrons is considerably lower than that observed in terrestrial quartz (SiO2). (C) 2012 Elsevier B.V. All rights reserved.