Abstract
An absolute np dσ/dΩ measurement is needed in order to address problems in the NN elastic scattering database. The information to be gained on both the shape and normalization would have a potentially large influence on the determinations of the charged pion-nucleon coupling constant based on analyses of np data. We describe the ongoing development of a tagged neutron facility at the Indiana University Cooler. The tagged neutron beam, produced via the interaction of a stored 200 MeV proton beam with a deuterium gas jet target, will be used to make an absolute measurement of the np backscattering cross section.
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