Abstract
Heavy ion bombardment of hydrogen provides a number of new possibilities for mono-energetic and quasi mono-energetic neutron beam production. Close to the threshold, the strong kinematic focussing for negative Q-value reactions gives rise to intense well-collimated beams of MeV neutrons. An experimental study of 0° neutron production in the 1H( 7Li, n) reaction ( Q = −1.64 MeV) has been carried out from the threshold energy, 13.15 MeV, up to 22 MeV. Measured cross sections are compared to prediction based on known 7Li(p, n) cross sections. At 13.5 MeV the effective cross section reaches 4 b/sr, and the neutrons are confined within a cone of half angle 9°. Cross section predictions for 9Be, 11B and 13C bombardment of hydrogen are also presented.
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