Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 123, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2011398
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Photodissociation of cold magnesium hydride ions MgH+ leading to either Mg++H or Mg+H+ is simulated from first principles. The purpose is to study the possibility of single molecule control of the products in the presence of two laser fields. The system evolves on four electronic potential-energy curves, X-1 Sigma, A(1) Sigma, B-1 Pi, and C-1 Sigma. These potential-energy curves are calculated from first principles using multireference self-consistent field theory. The accuracy of the electronic potential curves has been checked by calculating the energies of the rovibrational eigenstates and comparing them to experimental findings. The photodissociation dynamics has furthermore been simulated by solving the time-dependent Schrodinger equation. It is shown that the branching ratio of the two dissociation channels, Mg++H or Mg+H+, can be controlled by changing the intensity and wavelength of the two driving laser fields. (C) 2005 American Institute of Physics.
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