Measurement of the Absolute np Scattering Differential Cross Section at 194 MeV

M. Sarsour , T. Peterson , M. Planinic , S.E. Vigdor , C. Allgower , B. Bergenwall , J. Blomgren , T. Hossbach

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W.W. Jacobs C. Johansson J. Klug A.V. Klyachko P. Nadel-Turonski L. Nilsson N. Olsson S. Pomp J. Rapaport T. Rinckel E.J. Stephenson U. Tippawan S.W. Wissink Y. Zhou

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classification ⚛️ nucl-ex

keywords crossabsolutedifferentialmeasurementsectionaccordanalysesangle-dependence

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We describe a double-scattering experiment with a novel tagged neutron beam to measure differential cross sections for np back-scattering to better than 2% absolute precision. The measurement focuses on angles and energies where the cross section magnitude and angle-dependence constrain the charged pion-nucleon coupling constant, but existing data show serious discrepancies among themselves and with energy-dependent partial wave analyses (PWA). The present results are in good accord with the PWA, but deviate systematically from other recent measurements.

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Measurement of the Absolute np Scattering Differential Cross Section at 194 MeV

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