X-ray emission spectroscopy of one-electron capture into Li-like radiative N4+(1s21n'1') configurations by metastable N5+(1s2s 3S) ions in collisions with He and H2 at 3.4 keV amu -1

De-excitation of doubly excited N4+(1s2ln'l') ions produced in N5+(1s2s 3S) (3.4 keV amu-1)+He, H2 collisions has been studied in the 1-5 nm wavelength range. It is shown that the spectrum consists of lines mostly due to states produced by core-conserving capture processes except for an intense peak around 2.9 nm that could be due to electron capture with simultaneous 2s-2p core excitation. Moreover, many lines can be identified as originating from doublet states.