Abstract:
The probing time for sampling the internal dynamics of a molecular system should be
comparable to the time-scale associated with the internal motion in a molecule, which
ranges from femtoseconds (fs) to picoseconds (ps). Recent development in laser technology
make it possible to probe a molecular system with intense and ultrashort laser
pulses with large bandwidth.
In the presence of intense ( 10-100 TW/cm2) and ultrashort ( 25 fs) laser field a
molecule may go through ionization and eventually dissociates into various ionic and
neutral fragments. Several transient electronic processes plays an key role in the molecular
dissociation dynamics in the presence of intense, ultrashort laser field. One of the
possible ways to understand the dissociation dynamics of the molecular system through
various complex electronic processes is by capturing the velocity spread and the angular
distribution of the ionic fragments with respect to the polarization axis of the laser
field.
The main objective of this work is to understand the influence of the electronic processes
in the dissociation dynamics. Two different aspects of the electronic processes
have been addressed here by using a Velocity Map Imaging (VMI) technique along with
detailed quantum chemistry calculations.
