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Title:EXPERIMENTAL EVIDENCE OF THE ν3 MODE IN NO3 VIA SLOW PHOTOELECTRON VELOCITY-MAP IMAGING OF COLD NO3−
Author(s):Babin, Mark C
Contributor(s):Neumark, Daniel ; Stanton, John F.; DeVine, Jessalyn A.
Subject(s):Radicals
Abstract:With five electronic states within 2 eV, the nitrate radical (NO$_3$) has a rich vibronic landscape for which photoelectron spectroscopy is an ideal probe. Here, we use slow photoelectron velocity map imaging of cryogenically cooled anions (cryo-SEVI), a high-resolution variant of anion photoelectron spectroscopy, to investigate the vibronic structure of the $\tilde{X}^2A'_2$ state of NO$_3$. Our cryo-SEVI spectra are in excellent agreement with Franck-Condon simulations produced using a three-state K\"{o}ppel-Domke-Cederbaum (KDC) Hamiltonian constructed for the NO$_3$ radical. Together, the experimental and simulated spectra provide clear evidence that the $\nu_3$ fundamental resides near 1060 cm$^{-1}$, resolving a long-standing controversy surrounding this vibrational fundamental. Further, the appearance of activity along the $\nu_4$ mode in this cryogenically-cold system verifies its activity through a Herzberg-Teller interaction, rather than as a hot band as previously suggested.
Issue Date:2019-06-18
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/104265
DOI:10.15278/isms.2019.TD06
Rights Information:Copyright 2019 Mark C Babin
Date Available in IDEALS:2019-07-15
2020-01-25


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