The 15N(α,γ)19F and 15O(α,γ)19Ne reactions in a microscopic multicluster model Original Research Article

We investigate the 15N(α,γ)19F and 15O(α,γ)19Ne reactions by using a multicluster description of 15N and 15O. The 15N(α,γ)19F and 15O(α,γ)19Ne wave functions are defined in the Generator Coordinate Method, using α and triton (or 3He) wave functions. The band structure and the E2 transition probabilities are well reproduced by the model, but some resonances, important for astrophysics, are missing. The non-resonant part of the 15N(α,γ)19F and 15O(α,γ)19Ne capture cross sections is discussed.