  In this work, inspired by the symmetron model, we analyse the evolution of
spherical domain walls by considering specific potentials that ensure symmetry
breaking and the occurrence of degenerate vacua that are necessary for the
formation of domain walls. By considering a simple analytical model of
spherical domain wall collapse in vacuum, it is shown that this model fits the
more accurate numerical results very well until full collapse, after which
oscillations and scalar radiation take place. Furthermore, we explore the
effect of a central non-relativistic matter lump on the evolution of a
spherical domain wall and show that the central lump can prevent the full
collapse and annihilation of the domain wall bubble, due to the repulsion
between the domain wall and matter over-density within the adopted symmetron
inspired model.
