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Photodetachment dynamics from closed‐shell anions in the presence of a bichromatic field
Author(s) -
Mondal Chandan Kumar
Publication year - 2005
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.20493
Subject(s) - ion , atomic physics , hamiltonian (control theory) , halide , ionization , chemistry , field (mathematics) , bound state , ground state , quantum yield , physics , quantum mechanics , inorganic chemistry , mathematical optimization , mathematics , pure mathematics , fluorescence
I have studied the dynamics of photodetachment from closed‐shell anions in the presence of a two‐color (bichromatic) laser field. The electronic states of halide ions are modeled by a 1‐D Hamiltonian with a potential V ( x ) = − V 0 e −σ x 2. The two parameters V 0 and σ are fixed by requiring V ( x ) to reproduce the experimentally observed ground‐state ionization energy of the halide ions concerned. The potentials so generated are shown to support only one bound state in each case. The time‐dependent Fourier grid Hamiltonian method is used to follow the detachment dynamics with fairly high intensities of light. The environmental effects on the dynamics are sought to be modeled by allowing the well depth ( V 0 ) to fluctuate randomly ( V 0 ( t ) = V 0 [1 + Δ VR ( t )]; R ( t ) randomly fluctuates between +1 and −1 with time, when ΔV is fixed). The average detachment rate constants k av are seen to increase with increase in the intensities of used bichromatic field. An alternative model potential, V ( x ) = − V 0 e −σ x , is also shown to yield similar results. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2005