Cross sections of the 147 Sm(n, α) 144 Nd reaction were measured at En=5.0 and 6.0MeV. A twin gridded ionization chamber was used as a charged particle detector and two large area 147 Sm 2 O 3 samples placed back to back were employed. Experiments were performed at the 4.5MV Van de Graaff accelerator of Peking University. Neutrons were produced through the D(d, n) 3 He reaction with a deuterium gas target. Absolute neutron flux was determined by a small 238 U fission chamber. Present cross-section data are compared with existing results of evaluations and measurements.