The ${}^{16}$N $\beta$-delayed $\alpha$ decay : Today and Tomorrow

The ${}^{12}$C($\alpha$,$\gamma$)${}^{16}$O is one of the most important reactions in nuclear astrophysics. The best determination of the S factor relies on three different experiments, the elastic scattering of $\alpha$ off ${}^{12}$C, the $\alpha$ capture reaction on ${}^{12}$C and the ${}^{16}$N $\beta$ delayed $\alpha$ decay. In this talk, I will review the current status of the existing ${}^{16}$N decay experiments. I will also discuss the possible ${}^{16}$N experiments in the near future to achieve more accurate S factor.