Abstract

With the model of a rotor plus two quasi-particles, the signature inversion (SI) in two odd-odd nuclei102Rh and98Rh in the mass region A 100 is studied. The calculation results show that the possible SI mechanism, which has been confirmed by the calculation of odd-odd nuclei in the A 160 and A 80 regions (i.e., the competition between the n–p interaction and the coriolis force in low K space) is also appropriate for odd-odd nuclei in the A 100 region. This seems to indicate that there might be a universal mechanism of SI in odd-odd nuclei for different mass regions.

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