A research program on mines detection, EXPLODET, has been developed since 1997 in Italian universities. In order to obtain a portable neutron source , on can use californium-252, an artificial nucleus located well beyond the uranium on the nuclei chart. californium-252 has an half-life of 2.6 years, undergoes 3% of spontaneous fission and therefore emits neutrons. But with this source, the detection of gamma characteristics is difficult. The alternative is to use a mini-compact accelerator of 100 kilovolts, capable of producing 14.8 MeV neutrons of energy through the deuterium-tritium nuclear reaction. These neutrons would allow a much easier detection of gamma, but the difficulty is to have a enough portable equipment on the field.