  When confined to small regions quantum systems exhibit electronic and
structural properties different from their free space behavior. These
properties are of interest, for example, for molecular insertion, hydrogen
storage and the exploration of new pathways for chemical and nuclear reactions.
Here, a confined three-body problem is studied, with emphasis on the study of
the "quantum scars" associated to dynamical collisions. For the particular case
of nuclear reactions it is proposed that a molecular cage might simply be used
as a confining device with the collision states accessed by quantum control
techniques.
