A study of open shell nuclei using chiral two-body interactions

We apply the hybrid-multi-determinant method using the recent chiral two-body interactions of Entem–Machleidt–Nosyk without renormalization to few nuclei up to A = 48. Mostly we use the bare fifth order NN interaction N4LO-450. For ²⁴Mg and ⁴⁸Cr the excitation energies of the $2_1^{+}$ states are far larger than the corresponding experimental values. (paper)