  Self-Destructing Dark Matter (SDDM) is a class of dark sector models in which
the collision of a dark sector particle with the earth induces its prompt decay
into Standard Model particles, generating unique signals at neutrino detectors.
The inherent fragility of SDDM makes its survival from the early universe
unlikely, implying a late time production mechanism. We present an efficient
late time production mechanism for SDDM based on atomic rearrangement, the
mechanism responsible for muon or anti-proton capture in hydrogen. In this
model, an atomic rearrangement process occurs in our galaxy, converting dark
atoms into highly excited bound states - our SDDM candidates. While the
resulting SDDM is only a small fraction of the dark matter flux, its striking
self-destruction signals imply a significant discovery reach in the existing
data from the Super-Kamiokande experiment.
