  The 235U(n,f) cross section was measured in a wide energy range (25 meV - 170
keV) at the n_TOF facility at CERN, relative to 6Li(n,t) and 10B(n,alpha)
standard reactions, with high resolution and accuracy, with a setup based on a
stack of six samples and six silicon detectors placed in the neutron beam. In
this paper we report on the results in the region between thermal and 10 keV
neutron energy. A resonance analysis has been performed up to 200 eV, with the
code SAMMY. The resulting fission kernels are compared with the ones extracted
on the basis of the resonance parameters of the most recent major evaluated
data libraries. A comparison of the n_TOF data with the evaluated cross
sections is also performed from thermal to 10 keV neutron energy for the
energy-averaged cross section in energy groups of suitably chosen width. A good
agreement is found in average between the new results and the latest evaluated
data files ENDF-B/VIII and JEFF-3.3, as well as with respect to the IAEA
reference files. However, some discrepancies are still present in some specific
energy regions. The new dataset here presented, characterized by unprecedented
resolution and accuracy, can help improving the evaluations in the Resolved
Resonance Region and up to 10 keV, and reduce the uncertainties that affect
this region.
