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Rostock 2019 – scientific program

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MO: Fachverband Molekülphysik

MO 9: Molecules in Intense Laser Fields

MO 9.6: Talk

Monday, March 11, 2019, 17:30–17:45, S HS 002 Biologie

An alternative dissociation pathway of N22+Lazaros Varvarezos1, •Alexander Achner2, René Wagner2, John Costello1, Michael Meyer2, and Patrik Grychtol21School of Physical Sciences and NCPST, Dublin City University, Dublin 9, Ireland — 2Small Quantum Systems Group, European XFEL GmbH, 22869 Schenefeld, Germany

Since the advent of lasers as spectroscopic tools, N2 has served as a benchmark system to shed light on the phenomena induced by intense laser fields. In our study, we focus on the dissociation mechanism of the molecular dication N22+. Our interest in the dication was stimulated by a study that revealed the presence of two different N+ +N+ states, energetically separated by about 4 eV for the first time [1]. Our findings suggest the presence of two ion pairs, separated by approximately 2 eV originating from fast and slow decay channels. Most likely, the fast pair of ions stems from the 1Σg+ state after the removal of two 3σg electrons, while the slow ion pair results from the 3Πu state of the molecular ion after the removal of one 3σg electron and one 1πu electron. Furthermore, we reach to the very important conclusion that the slow channel is the precursor for the N22+ ions, due to the existence of a strong intensity dependence, which is not present in the case of the faster ions.
[1] Lai et al., Physical Review A 84, 043413 (2011).

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