On the role of high-multipolarity interactions in deformed nuclei

Abstract
The influence of interactions with the multipolarity lambda =5, 6, 7 and 9 is studied on the mixing of two-quasineutron and two-quasiproton states with large K in doubly-even deformed nuclei. The mixing of two-quasineutron and two-quasiproton states with the same values of Kpi , caused by a high-multipolarity interaction, is shown to be large in the case of proximity of their energies. A qualitatively correct description of experimental data on the mixing of two-quasineutron and two-quasiproton configurations in 178,176Hf, 174Yb, 168Er and 158Gd is obtained.