Measurements of neutron capture cross-sections at n_TOF

Capture cross-sections on isotopes relevant to accelerator driven systems for energy production and nuclear waste transmutation, and to stellar nucleosynthesis have been studied at the innovative neutron time of flight facility n_TOF at CERN. The extremely high instantaneous neutron flux and the low background conditions in the experimental area make this facility unique for accurate measurements on low-mass or radioactive samples. The n_TOF facility is described, together with the features of the experimental apparata used. First results of the experimental campaign 2002-2004 are presented.