At 200, 300, and 400 MeV bombarding energies, we measured cross section angular distributions for the Li(p, n) Be(g.s. +0.43 MeV) reaction and 0' cross sections for the ' C(p, n)' N(g. s.) reaction.Systematics of these reactions are presented.The center-of-mass cross section for the Li(p, n) Be(g.s. +0.43 MeV) reaction, when plotted as a function of momentum transfer, is nearly independent of energy. The laboratory cross section for this reaction at 0' in the energy range from 60 to 400 MeV is also independent of energy, having a constant value, to within experimental errors, of 35.5 mb/sr with an estimated uncertainty of +1.5 mb/sr.
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