Four neutron capture experiments were carried out at the Institut Laue– Langevin (ILL), Grenoble, with the FIPPS γ-ray spectrometer, with the aim of performing a complete low-spin spectroscopy study of 42,43,44,45Ca isotopes. The goal of the project is to investigate the structure of Ca isotopes in the A ∼ 40–48 mass region, focusing in particular on shape coexistence phenomena. Preliminary results on 42Ca are discussed here, for which more than 10 new levels and 100 new transitions were found. Angular correlation analysis was also carried out based on newly found transitions, in order to pin down the spin-parity values for a number of new levels.