Plasma recombination rate coefficients for Be-like F as a function of electron temperatures. The black solid line and grey shaded area represent the experimentally derived n_cutoff and field-ionization-free total (DR+TR) recombination rate coefficients, respectively. The open circles show field-ionization-free DR+TR rate coefficients from AUTOSTRUCTURE calculations. The calculated results from the literature are shown by the following symbols: open stars – Dittner et al. (1987); filled stars – Colgan et al. (2003); filled squares – Mazzotta et al. (1998); and open triangles – Badnell et al. (1991)