Gamma-ray production cross sections for carbon and nitrogen from threshold to 20.7 MeV

Gamma-ray production cross sections were measured for the 12C(n,xγ) and 14N(n,xγ) reactions from 2.0- to 20.7-MeV neutron energy using the Intelcom Rad Tech Linac source. The carbon cross sections are presented for both high neutron resolution and ten broad neutron groups spanning the energy range. Cross sections for the discrete gamma-ray peaks from nitrogen are presented in 12 broad neutron groups, as are the ''discrete plus continuum'' cross sections obtained by unfolding the gamma-ray spectra. The measured cross sections generally agree with the evaluations and with previous measurements. 3 tables, 16 figures