Abstract
We analyze interference effects in photoionization of H+2 molecular targets in laser assisted photoionization. By means of a simple model, we obtain observables for the reaction and we compare them with previous results obtained with more elaborated ones. Interestingly, previous interference effects predicted for monochromatic pulses persist in the presence of a laser NIR bath leading to a characteristic photoelectron spectrum.
Highlights
In the last decade, the development of extreme ultraviolet (XUV) pulses with durations of a few hundreds of attoseconds has opened the way to a new and fascinating branch of physics, intimately related to atomic and molecular physics [1]
In the so called pump-probe experiments ([1] and references therein) where the reaction is assisted with a near infrared (NIR) laser, it is possible to extract information about attosecond pulses (ATP) [2] as well as monitoring and/or steering electron dynamics in atoms and molecules [3, 4] and mapping molecular wave-packets [5]
Several works are devoted to the characterization of single ATP (SATP) and attosecond pulse trains (ATPT) [8, 9] and the widespread experimental procedure is the conversion of them into electron wave packets by means of photoionization of atoms assisted by a NIR laser field
Summary
The development of extreme ultraviolet (XUV) pulses with durations of a few hundreds of attoseconds has opened the way to a new and fascinating branch of physics, intimately related to atomic and molecular physics [1]. In the so called pump-probe experiments ([1] and references therein) where the reaction is assisted with a near infrared (NIR) laser, it is possible to extract information about ATP [2] as well as monitoring and/or steering electron dynamics in atoms and molecules [3, 4] and mapping molecular wave-packets [5]. The initial molecular wavefunctions are described here as a linear combination of Slater type orbitals (STOs) variationally optimized whereas the final wavefunctions are SCV type wavefunctions [16] Employing these initial and final wavefunctions, analytical expressions for the observables of interest, namely, photoionization spectrum, multiple differential cross sections, photoelectron angular distributions (PADS), etc, are obtained.
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