  Spherical colloidal crystals (CCs) self-assemble on the interface between two
liquids. These 2D structures unconventionally combine local hexagonal order and
spherical geometry. Nowadays CCs are actively studied by altering their
structures. However, the statistical analysis of such experiments results is
limited by uniqueness of self-assembled structures and their short lifetime.
Here we perform numerical experiments to investigate pathways of CC structure
relaxation after the intrusion of interstitial. The process is simulated in the
frames of overdamped molecular dynamics method. The relaxation occurs due to
interaction with extended topological defects (ETDs) mandatory induced in
spherical CCs by their intrinsic Gaussian curvature. Types of relaxation
pathways are classified and their probabilities are estimated in the
low-temperature region. To analyze the structural changes during the relaxation
we use a parent phase approach allowing us to describe the global organization
of spherical order. This organization is preserved by only the most typical
relaxation pathway resulting in filling one of vacancies integrated inside the
ETD areas. In contrast with this pathway the other ones shift the ETDs centers
and can strongly reconstruct the internal structure of ETDs. Temperature
dependence of the relaxation processes and the mechanism of dislocation
unbinding are discussed. Common peculiarities in relaxation of spherical
structures and particular fragments of planar hexagonal lattice are found.
