[en] The photodisintegration of ²³⁷Np has been studied using monochromatic photons produced by thermal neutron capture in several materials. The partial cross sections σ gamma, sub(f) and σ gamma, sub(n) were measured in the energy interval from 5.43 MeV to 10.83 MeV. Analysing the photofission data according to the liquid drop model, the height (E sub(f)) and the curvature ((h/2π)ω) of the simple fission barrier were determined: E sub(f) = (5.9 ^+- 0.2) MeV and (h/2π)ω = (0.8 ^+- 0.4) MeV. For the competition between photoneutron emission and fission (GAMMA sub(n) / GAMMA sub(f) a constant value was found (1.28^+- 0.15) in the energy range 6.73 - 10.83 MeV. From this result the following nuclear temperatures for ²³⁷Np were extracted on bases of some models of levels density: T = 0.84 ^+- 0.06 MeV (Fujimoto-Yamaguchi model) and T = 0.60 ^+- 0.04 MeV (Constant Nuclear temperature model). (Author)