Abstract
The neutron neutron (nn) final-state interaction has been studied in the n + d → p + n + n reaction at 40 ± 5 MeV. Data on the dependence of reaction yield on the relative energy of two neutrons emitted in a narrow cone of angles are obtained. The value of the nn-scattering length deduced from a comparison of the shape of FSI peak with simulation data is ann = −17.9 ± 1.0 fm, where the error indicates the statistical uncertainty.
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