Article (Scientific journals)
Photodissociation of the carbon monoxide dication in the 3 Sigma- manifold: Quantum control simulation towards the C2+ + O channel
Vranckx, Stephane; Loreau, Jerome; Vaeck, Nathalie et al.
2015In Journal of Chemical Physics, 143, p. 164309
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Keywords :
Laser control; non adiabatic dynamics; photodissociation
Abstract :
[en] The photodissociation and laser assisted dissociation of the carbon monoxide dication X3Π CO2+ into the 3Σ− states are investigated. Ab initio electronic structure calculations of the adiabatic potential energy curves, radial nonadiabatic couplings, and dipole moments for the X 3Π state are performed for 13 excited 3Σ− states of CO2+. The photodissociation cross section, calculated by time-dependent methods, shows that the C+ + O+ channels dominate the process in the studied energy range. The carbon monoxide dication CO2+ is an interesting candidate for control because it can be produced in a single, long lived, v = 0 vibrational state due to the instability of all the other excited vibrational states of the ground 3Π electronic state. In a spectral range of about 25 eV, perpendicular transition dipoles couple this 3Π state to a manifold of 3Σ− excited states leading to numerous C+ + O+ channels and a single C2+ + O channel. This unique channel is used as target for control calculations using local control theory. We illustrate the efficiency of this method in order to find a tailored electric field driving the photodissociation in a manifold of strongly interacting electronic states. The selected local pulses are then concatenated in a sequence inspired by the “laser distillation” strategy. Finally, the local pulse is compared with optimal control theory.
Disciplines :
Physics
Chemistry
Author, co-author :
Vranckx, Stephane;  Université Libre de Bruxelles - ULB
Loreau, Jerome;  ulb
Vaeck, Nathalie
Meier, christoph;  Université de Toulouse
Desouter, Michèle ;  Université de Liège > Département de chimie (sciences) > Département de chimie (sciences)
Language :
English
Title :
Photodissociation of the carbon monoxide dication in the 3 Sigma- manifold: Quantum control simulation towards the C2+ + O channel
Publication date :
2015
Journal title :
Journal of Chemical Physics
ISSN :
0021-9606
eISSN :
1089-7690
Publisher :
American Institute of Physics
Volume :
143
Pages :
164309
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 October 2015

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