  In this study, we present a model for the behavior of Dirac particles under
the tensor effect in the spherical core/shell regime. We examine the change of
energy levels corresponding to the particles localized in a space of
approximately 1.0 fm in the core region of the quantum sphere, with the well
width. It also occurs from the analytical solutions that the two different
levels accompany particle states of the same mass. Additionally, the solutions
exhibiting anomalous behavior, giving rise to antiparticle-type states, occur
at heavier mass.
