Negative parity states in Ne chain are experimentally well known but never described by shell model calculations. In order to explain these states, one must take into account an excitation of odd number particles between two major shells of different parity (in our case: p to sd or sd to pf). Using a new complete 1hw interaction, recently developed by M.Bouhelal et al.1, we propose a new quantitative interpretation of these states.
We will present the comparison between calculations results on lifetime and electromagnetic transitions using the new interaction and experimental data.