  Neutron total and capture cross sections of Lanthanum(La)-139 were measured
at the Accurate Ne-utron-Nucleus Reaction measurement Instrument (ANNRI) of the
Materials and Life Science Experimental Facility (MLF) in the Japan Proton
Accelerator Research Complex (J-PARC). The total cross section was largely
different from that in evaluated libraries, such as JENDL-5, in the energy
range from 80 to 900~eV. Resonance parameters for four resonances including one
negative resonance were obtained using a resonance analysis code, REFIT. The
resonance analysis revealed discrepancies in several resonance parameters with
the evaluated libraries. Furthermore, the information about the scattering
radius was also extracted from the results of the total cross section. The
obtained scattering radius was larger than that recorded in the evaluated
libraries.
