  We investigate kink-antikink collisions in a model characterized by two
scalar fields in the presence of geometric constrictions. The model includes an
auxiliary function that modifies the kinematics associated with one of the two
fields. An important fact is that one of the fields can be solved
independently, being responsible for changing the internal structure of the
second one. We performed several collisions and observed the presence of
resonance windows for small values of the parameters. Furthermore, we have been
able to show the alternation between the appearance of oscillating pulses, as
well as the annihilation and formation of kink-antikink pairs when the
geometric constriction is more pronounced. The study of kink dynamics in models
with geometric constrictions is connected with issues of interest such as
domain wall formation and magnetization at the manometric scale.
