We report the control of the ionization yield ratio of different vibrational levels of the electronic ground state of NO~+ by feedback optimization of shaped ultra-short laser pulses. The nitric oxide NO molecule is excited by the second harmonic of a phase-shaped Ti: sapphire femtosecond laser. The optimization of pulse taioring by a learning evolutionary algorithm leads to significant modifications of the vibrational ionic distribution observed by photoelectron spectroscopy. The control exerted over two groups of photoelectrons is robust and reveals some selectivity.
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