Probing vibrational wave packets in molecular excited states |
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Authors: | Alberto Gonz��lez-Castrillo Jhon Fredy P��rez-Torres Alicia Palacios Fernando Mart��n |
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Affiliation: | 1. Departamento de Qu??mica, M??dulo 13, Universidad Aut??noma de Madrid, 28049, Madrid, Spain 2. Instituto Madrile?o de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049, Madrid, Spain
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Abstract: | A time-dependent theoretical method is used to describe a UV pump?CUV probe strategy to trace, at a femtosecond time scale, the motion of vibrational wave packets created in excited states of the hydrogen molecule by measuring single ionization probabilities. We use a spectral method to solve the time-dependent Schr?dinger equation in full dimensionality, including correlation and all electronic and vibrational degrees of freedom. A pump pulse initially creates a vibrational wave packet in the intermediate electronic excited states of $hbox{H}_2$ . The frequency of the probe is chosen to ionize the target leaving the ion in a bound vibrational state. By varying the time delay between pulses, non-dissociative single ionization is enhanced or suppressed. Energy differential ionization probabilities are reported and compared with a model based on the Franck?CCondon approximation. |
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