[en] In some cases stellar reaction rates can be determined by observing the β-delayed particle emission of states relevant to nucleosynthesis. The βα-decay spectrum of ¹⁶N, e.g., permits the determination of the α+¹²C reduced width of the E_x = 7.12 MeV sub-threshold state of ¹⁶O. This state, in turn, dominates the low-energy p-wave capture amplitude of the astrophysically important reaction ¹²C(α,γ)¹⁶O. The α-spectrum following the decay of ¹⁶N has been measured with the help of the TRIUMF isotope separator TISOL. The data obtained, which include 10⁶ α-¹²C coincidences, show that the main α-peak is accompanied by a lower-energy interference structure, as predicted by several authors. The spectrum obtained has been fitted in a K- and R-matrix parametrization. Details of the fits are reported. In addition, an outlook of other reactions important to nucleosynthesis accessible by β-delayed particle emission is given