Abstract
We have measured the neutron-induced formation cross sections up to E n = 38 MeV for 14C from oxygen and 26Al from silicon. SiO 2 and Si targets were irradiated with semi-monoenergetic neutrons from the 9Be(p,n) 9B and Li(p,n) 7Be reactions at several proton energies. The neutron energy spectra were determined by a NE-213 spectrometer. The 14C and 26Al produced in the targets were measured by accelerator mass spectrometry using a 4 MV tandem accelerator at the Univeristy of Tokyo. The excitation functions for the 16O(n,x) 14C and nat. Si(n,x) 26Al reactions were obtained from the neutron flux distribution and the measured number of atoms.
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