Abstract
Properties of the effective neutron-proton interaction in deformed light nuclei, such as 18, 20F, 22, 24Na, 26, 28Al), 30, 32P and 34Cl, are studied using experimental data on the energy difference between the two rotational band heads and the mutual interaction energy between the neutron and proton in each nucleus by using a symmetric core rotational model. The results show that the systematics of the experimental data can be explained by our simple model. The value of the effective-force range parameter obtained is fairly short compared with the range which is usually employed in the spherical shell-model calculation. In connection with these results, the effects of the force range and force mixture on the nuclear deformation are discussed.
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