Observation of a new electronic state of CO perturbing W1Π (v=1)

A. N. Heays; M. Eidelsberg; G. Stark; J. L. Lemaire; L. Gavilan; S. R. Federman; B. R. Lewis; J. R. Lyons; N. De Oliveira; D. Joyeux

doi:10.1063/1.4897326

Observation of a new electronic state of CO perturbing W¹Π (v=1)

A. N. Heays^*, M. Eidelsberg, G. Stark, J. L. Lemaire, L. Gavilan, S. R. Federman, B. R. Lewis, J. R. Lyons, N. De Oliveira, D. Joyeux

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We observe photoabsorption of the W(1) ← X(0) band in five carbon monoxide isotopologues with a vacuum-ultraviolet Fourier-transform spectrometer and a synchrotron radiation source. We deduce transition energies, integrated cross sections, and natural linewidths of the observed rotational transitions and find a perturbation affecting these. Following a deperturbation analysis of all five isotopologues, the perturbing state is assigned to the v = 0 level of a previously unobserved ¹Π state predicted by ab initio calculations to occur with the correct symmetry and equilibrium internuclear distance. We label this new state E^″ ¹Π. Both of the interacting levels W(1) and E^″(0) are predissociated, leading to dramatic interference effects in their corresponding linewidths.

Original language	English
Article number	144311
Journal	Journal of Chemical Physics
Volume	141
Issue number	14
DOIs	https://doi.org/10.1063/1.4897326
Publication status	Published - 14 Oct 2014

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title = "Observation of a new electronic state of CO perturbing W1Π (v=1)",

abstract = "We observe photoabsorption of the W(1) ← X(0) band in five carbon monoxide isotopologues with a vacuum-ultraviolet Fourier-transform spectrometer and a synchrotron radiation source. We deduce transition energies, integrated cross sections, and natural linewidths of the observed rotational transitions and find a perturbation affecting these. Following a deperturbation analysis of all five isotopologues, the perturbing state is assigned to the v = 0 level of a previously unobserved 1Π state predicted by ab initio calculations to occur with the correct symmetry and equilibrium internuclear distance. We label this new state E″ 1Π. Both of the interacting levels W(1) and E″(0) are predissociated, leading to dramatic interference effects in their corresponding linewidths.",

author = "Heays, {A. N.} and M. Eidelsberg and G. Stark and Lemaire, {J. L.} and L. Gavilan and Federman, {S. R.} and Lewis, {B. R.} and Lyons, {J. R.} and {De Oliveira}, N. and D. Joyeux",

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TY - JOUR

T1 - Observation of a new electronic state of CO perturbing W1Π (v=1)

AU - Heays, A. N.

AU - Eidelsberg, M.

AU - Stark, G.

AU - Lemaire, J. L.

AU - Gavilan, L.

AU - Federman, S. R.

AU - Lewis, B. R.

AU - Lyons, J. R.

AU - De Oliveira, N.

AU - Joyeux, D.

PY - 2014/10/14

Y1 - 2014/10/14

N2 - We observe photoabsorption of the W(1) ← X(0) band in five carbon monoxide isotopologues with a vacuum-ultraviolet Fourier-transform spectrometer and a synchrotron radiation source. We deduce transition energies, integrated cross sections, and natural linewidths of the observed rotational transitions and find a perturbation affecting these. Following a deperturbation analysis of all five isotopologues, the perturbing state is assigned to the v = 0 level of a previously unobserved 1Π state predicted by ab initio calculations to occur with the correct symmetry and equilibrium internuclear distance. We label this new state E″ 1Π. Both of the interacting levels W(1) and E″(0) are predissociated, leading to dramatic interference effects in their corresponding linewidths.

AB - We observe photoabsorption of the W(1) ← X(0) band in five carbon monoxide isotopologues with a vacuum-ultraviolet Fourier-transform spectrometer and a synchrotron radiation source. We deduce transition energies, integrated cross sections, and natural linewidths of the observed rotational transitions and find a perturbation affecting these. Following a deperturbation analysis of all five isotopologues, the perturbing state is assigned to the v = 0 level of a previously unobserved 1Π state predicted by ab initio calculations to occur with the correct symmetry and equilibrium internuclear distance. We label this new state E″ 1Π. Both of the interacting levels W(1) and E″(0) are predissociated, leading to dramatic interference effects in their corresponding linewidths.

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U2 - 10.1063/1.4897326

DO - 10.1063/1.4897326

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SN - 0021-9606

VL - 141

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 14

M1 - 144311

ER -

Observation of a new electronic state of CO perturbing W¹Π (v=1)

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