Neutron capture cross sections of 69Ga and 71Ga at 25 keV and Epeak = 90 keV

We measured the neutron capture cross sections of 69 Ga and 71 Ga for a quasi-stellar spectrum at k B T = 25 keV and a spectrum with a peak energy at 90 keV by the activation technique at the Joint Research Centre (JRC) in Geel, Belgium. Protons were provided by an electrostatic Van de Graaff accelerator to produce neutrons via the reaction 7 Li(p,n). The produced activity was measured via the γ emission of the product nuclei by high-purity germanium detectors. We present preliminary results.