Dielectronic recombination of N4+ -: art. no. 043609

The dielectronic recombination spectrum of N4+ has been measured with high resolution and accuracy. The 1s(2)2p5l resonances in the energy range 0-1.6 eV were studied in detail. The experimental spectrum is compared with the results from four different calculations. An almost perfect agreement between the experiment and a calculation which combines relativistic many-body perturbation theory and complex rotation is found. The calculation provides accurate spectroscopic data for all fifty 1 s(2)p 5l states. The literature value for the 1s(2)2p5s P-1 energy level is found to be off by more than 0.1 eV.