Record Details

Title:
An alternative dissociation pathway of $N_{2}^{2+}$
Affiliation(s):
EuXFEL staff
Author group:
Instrument SQS
Topic:
Scientific area:
Abstract:
Since the advent of lasers as spectroscopic tools, $N_{2}$ 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 $N_{2}^{2+}$. 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. 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 $^{1}\Sigma _{+}^{g}$ state after the removal of two $3\sigma_{g}$ electrons, while the slow ion pair results from the $^{3}\Pi_{u}$ state of the molecular ion after the removal of one $3\sigma_{g}$ electron and one $1\pi_{u}$ electron. Furthermore, we reach to the very important conclusion that the slow channel is the precursor for the $N_{2}^{2+}$ ions, due to the existence of a strong intensity dependence, which is not present in the case of the faster ions.
Imprint:
2019
Talk type:
Conference
Language(s):
English
Event information:
DPG Frühjahrstagung, Rostock, 2019-03-10, 2019-03-15
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