Abstract
The angular distributions of 237Np photofission fragments relative to the photon beam have been measured at energies of 5.60, 6.61 and 8.61 MeV, using an assembly of three independent fission chambers. The 2 MW IEA-R1 reactor at Sao Paulo was used to obtain the gamma -rays at these discrete energies following thermal neutron capture in dysprosium, titanium and nickel targets respectively. The experimental results show angular anisotropies of approximately 10% at 5.60 MeV and 6% at 6.61 MeV and an angular distribution practically isotropic ( approximately 2%) at 8.61 MeV.
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