Dielectronic recombination of N4+

• The dielectronic recombination spectrum of N4+ has been measured with high resolution and accuracy. The 1s22p5l resonances in the energy range from 0 to 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 1s22p5l states. The literature value for the 1s22p5s 1P energy level is found to be off by more than 0.1 eV.

Nyckelord

ELECTRON-ION RECOMBINATION

DOUBLY-EXCITED-STATES

LI-LIKE IONS

CROSS-SECTION

SI11+ IONS

LITHIUM

RESONANCES

PERTURBATION

EXCITATION

FIELDS

NATURAL SCIENCES

NATURVETENSKAP

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