Elsevier

Nuclear Physics

Volume 47, August 1963, Pages 241-250
Nuclear Physics

Scattering of 14 MeV neutrons from nitrogen and oxygen

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Abstract

The differential cross sections for elastic scattering of 14 MeV neutrons from nitrogen and oxygen have been measured in the angular range from 17 to 140°, using liquid targets and annular ring geometry. Inelastic scattering to the 2.31 and 3.95 MeV levels in N14 and to the levels near 6 and 7 MeV in O16 has been investigated over a more restricted angular range. The 2.31 MeV level in N14 is not excited appreciably, in disagreement with previously reported results. For both elements, the elastic scattering cross sections (determined to an accuracy of 10%) were found to be appreciably higher than the optical model predictions by Bjorklund and Fernbach for scattering angles larger than 70°. The inelastic cross sections measured are, within experimental accuracy, the same as the corresponding (p,p') cross sections.

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    ††

    This work was done under the auspices of the U.S. Atomic Energy Commission. A preliminary report has been presented at the Washington meeting of the American Physical Society (April, 1963).

    On leave of absence from Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts.

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