Der Einfluß der Restwechselwirkung VPN auf das Rotationsspektrum des u-u-Kerns 166Ho / The influence of the residual interaction fpu on the rotational spectrum of the odd-odd nucleus 166ho
Abstract Starting with a model for odd-odd nuclei, which had been used in former investigation (rigid, symmetrical top for the deformed even-even core, two extra particles in a Nilsson potential), the influence of the coupling term Hc and of the residual interaction VPN on the rotational spectrum of the odd-odd nucleus 166Ho are discussed. It is shown, that in this nucleus neither the coupling term Hc nor a pure Wigner force can explain the characteristic features of the rotational spectrum. It is therefore necessary to introduce a residual interaction VPN, which contains at least a spin-spin term. The explicit calculation for the nucleus 166Ho with a simple ansatz (δ-interaction with spin-spin term) already leads to a qualitative explanation of the particularities in the observed rotational spectrum. The investigations show a way how to get more information about the protonneutron interaction in odd-odd nuclei