Recombination spectra of F~(5+) producing F~(4+) have been investigated with high-energy resolution, using the CRYRING heavy-ion storage ring. The absolute recombination rate coefficients are derived in the centre-of-mass energy range of 0?25 eV. The experimental results are compared with intermediate-coupling AUTOSTRUCTURE calculations for 2s?2p (△n = 0) core excitation and show very good agreement in the resonance energy positions and intensities. Trielectronic recombination with 2s~2?2p~2 transitions are clearly identified in the spectrum. Contributions from F~(5+) ions in an initial metastable state are also considered. The energy-dependent recombination spectra are convoluted with Maxwell-Boltzmann energy distribution in the 103?106 K temperature range. The resulting temperature-dependent rate coefficients are compared with theoretical results from the literature. In the 10~3?10~4 K range, the calculated data significantly underestimates the plasma recombination rate coefficients. Above 8 × 10~4 K, our AUTOSTRUCTURE results and plasma rate coefficients from elsewhere show agreement that is better than 25 with the experimental results.
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