Anomalous rotational-alignment in N=Z nuclei and residual neutron-proton interaction

Details Anomalous rotational-alignment in N=Z nuclei and residual neutron-proton interaction Anomalous rotational-alignment in N=Z nuclei and residual neutron-proton interaction

2001-05-21

arxiv.org/abs/nucl-th/0105047v2

Phys.Rev. C64 (2001) 031302

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, final version accepted by Phys. Rev. C as a Rapid Communication

Scientific paper

10.1103/PhysRevC.64.031302

Recent experiments have demonstrated that the rotational-alignment for the $N=Z$ nuclei in the mass-80 region is considerably delayed as compared to the neighboring $N \ne Z$ nuclei. We investigate whether this observation can be understood by a known component of nuclear residual interactions. It is shown that the quadrupole-pairing interaction, which explains many of the delays known in rare-earth nuclei, does not produce the substantial delay observed for these $N=Z$ nuclei. However, the residual neutron-proton interaction which is conjectured to be relevant for $N=Z$ nuclei is shown to be quite important in explaining the new experimental data.

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