  We investigate soliton collisions a one-parameter family of scalar field
theories in 1+1 dimensions which was first discussed by Christ and Lee. The
models have a sextic potential with three local minima, and for suitably small
values of the parameter its kinks have an internal structure in the form of two
weakly-bound subkinks. We show that for these values of the parameter kink
collisions are best understood as an independent sequence of collisions of
these subkinks, and that a static mode analysis is not enough to explain
resonant structures emerging in this model. We also emphasise the role of
radiation and oscillon formation in the collision process.
