A characterization of vibrationally and electronically excited NO[sub 2][sup +] by high-resolution threshold photoionization spectroscopy

The pulsed-field ionization zero-electron kinetic-energy (PFI-ZEKE) threshold photoionization spectrum of NO[sub 2] from 9.58 to 20 eV is obtained using vacuum ultraviolet synchrotron radiation by means of the Chemical Dynamics Beamline at the Lawrence Berkeley National Laboratory Advanced Light Sou...

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Bibliographic Details
Published in:The Journal of chemical physics 1999-12, Vol.111:21
Main Authors: Jarvis, G.K., Song, Y., Ng, C.Y., Grant, E.R.
Format: Article
Language:English
Subjects:
ADVANCED LIGHT SOURCE
ATOMIC AND MOLECULAR PHYSICS
BREMSSTRAHLUNG
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
FERMI RESONANCE
IONIZATION
IONS
MOLECULAR STRUCTURE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATION SOURCES
RADIATIONS
RESONANCE
SPECTROSCOPY
SYNCHROTRON RADIATION
SYNCHROTRON RADIATION SOURCES 664200 > Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
VIBRATIONAL STATES
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Summary:The pulsed-field ionization zero-electron kinetic-energy (PFI-ZEKE) threshold photoionization spectrum of NO[sub 2] from 9.58 to 20 eV is obtained using vacuum ultraviolet synchrotron radiation by means of the Chemical Dynamics Beamline at the Lawrence Berkeley National Laboratory Advanced Light Source. The high resolution afforded by PFI threshold discrimination yields new or refined spectroscopic constants for a number of known excited states of the cation, including the first estimate of the [ital A] rotational constant in the a[sup 3]B[sub 2] state, as well as new fundamental frequencies for the A[sup 1]A[sub 2] and B[sup 1]B[sub 2] states, a precise determination of the singlet[endash]triplet splitting in the c[sup 3]B[sub 1][endash]C[sup 1]B[sub 1] complex and the first observations of the states, d[sup 3]A[sub 1] and D[sup 1]B[sub 2]. Most significantly, ZEKE photoelectron detection resolves vibrational structure in the linear X[sup 1][Sigma][sub g][sup +] ground state of NO[sub 2][sup +]. Vibrational positions in the first electron volt of the spectrum are found to conform with the predictions of a Hamiltonian that includes Fermi resonance and other anharmonic terms derived from earlier multiresonant laser spectroscopic experiments on the lower bending excited states. [copyright] [ital 1999 American Institute of Physics.] thinsp
ISSN:0021-9606
1089-7690
DOI:10.1063/1.480288