Spin-spin dependence of total cross sections as an effect of static nuclear deformation.

Abstract

Recently observed nuclear spin-spin dependence of total cross sections for ${\mathrm{n}}_{\mathrm{pol}{+\mathrm{}}^{27}}$${\mathrm{Al}}_{\mathrm{pol}}$ is accounted for by coupled-channels calculations that include the effects of the static quadrupole moment of $^{27}\mathrm{Al}$, and without any spin-spin potentials. Effective spin-spin interactions, of both spherical and tensor kinds, can thus be generated by static nuclear deformation.