  Quantum dots acting as single photon emitters in the blue-green range are
fabricated and characterized at cryogenic temperature. They consist in CdSe
dots inserted in (Zn,Mg)Se nanowires with a thick shell. Photoluminescence
spectra, decay curves and autocorrelation functions were measured under
nonresonant continuous-wave and pulsed excitation. An analytical approach is
applied simultaneously to the decay curves and correlation functions. It allows
a quantitative description of how these two quantities are affected by the
exciton rise due to biexciton feeding, the bright exciton decay, the effect of
the dark exciton, and the re-excitation between two laser pulses. Linewidths at
our limit of resolution (200 $\mu$eV) are recorded. The reported correlation
counts vary from a full control by re-excitation from traps, to a small
contribution of re-excitation by mobile carriers or other QDs, as low as 5%.
