Beam-foil studies of singly and doubly ionized nitrogen in the VUV

A detailed study of the N II-N III spectra after foil-excitation of fast nitrogen ions has covered the wavelength range 40 nm to 125 nm. Among a total of 366 lines recorded, all N II and N III lines given in the literature have been reproduced. For 130 lines not previously reported a charge state determination has been done, and for 5 lines new identifications are proposed. The analysis performed on low resolution spectra has been corroborated by high resolution data obtained at another laboratory.