Microscopic description of the 16O spectrum in a multiconfiguration cluster model

The ¹⁶O spectrum is investigated microscopically in a multiconfiguration generator-coordinate basis, including the α + ¹²C(0 ⁺), α + ¹²C(2 ⁺), p + ¹⁵N( {1}/{2}^-) and n + ¹⁵O( {1}/{2}^-) configurations. This choice allows a microscopic description of T = 1 states and of isospin impurities in low-lying states of the ¹⁶O nucleus. The model reproduces most of the T = 0 and T = 1 states below 14 MeV excitation energy. Different bands are suggested, for which valuable experimental candidates exist. A satisfactory agreement with experiment is obtained for the El, E2 and Ml transition probabilities.