  This work presents a photodissociation study of the diamondoid adamantane
using extreme ultraviolet femtosecond pulses. The fragmentation dynamics of the
dication is unraveled by the use of advanced ion and electron spectroscopy
giving access to the dissociation channels as well as their energetics. To get
insight into the fragmentation dynamics, we use a theoretical approach
combining potential energy surface determination, statistical fragmentation
methods and molecular dynamics simulations. We demonstrate that the
dissociation dynamics of adamantane dications takes place in a two-step
process: barrierless cage opening followed by Coulomb repulsion-driven
fragmentation.
