Within this topical field we are investigating the dynamics of
strong field interaction with ordered, loosely bound atomic or molecular
structures where the constituents still show their individual characteristics.
They are usually found in the form of small van der Vaals clusters,
however, also molecules assume the characteristics of these systems
during dissociation at large internuclear separation. Characteristic
of these systems are closely spaced electronic states at a large
internuclear separation where the electrons start to localize at
the individual constituents. They are moreover ideal candidates
to get insight into intramolecular electron scattering during strong
field ionization of noble gas dimers
A. von Veltheim, M. Baggash, H. Rottke
Strong field ionization of noble gas dimers induces a transition
from a van der Vaals bonded system to a "chemical"
bond in the singly charged ion which is for example similar
to the H2+ molecular ion bond at large
internuclear separation. The strong field excitation characteristics
is close to that of the atomic constituents of the dimer.
Even laser pulses with a moderate pulse width allow a separation
of strong field electronic excitation dynamics from nuclear
motion that is frozen while the light pulse is applied. This
usually allows one to disentangle electronic and nuclear dynamics.