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The spin-spin correlation parameters CLL=(L,L;0,0)=ALL and CSL=(S,L;0,0)=ASL for np elastic scattering were measured for incident polarized-neutron–beam kinetic energies of 484 and 634 MeV over the center-of-mass angles from ≃80° to 180°. The data are important for determining the I=0 nucleon-nucleon amplitudes. These results are compared with phase-shift calculations.
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We introduce a novel technique for the investigation of neutron-proton interactions in a bubble chamber, based on the tagging of neutrons by their interactions, which has made possible the absolute normalization of the neutron beams in two experiments. In addition, measurements have been made on elastic scattering and inclusive cross sections which have been largely inaccessible to existing bubble chamber techniques.
ERRORS ARE STATISTICAL. AN EXTRA 5 PCT SYSTEMATIC HAS TO BE ADDED.
ERRORS CONTAIN SOME SYSTEMATIC UNCERTAINTY.
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DATA AVERAGED FOR TWO DIRECTIONS OF TARGET POLARIZATION.
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