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Deperturbation analysis of an avoided crossing in the A1 v = 0 and B1 v = 0 states of WO

https://doi.org/10.1016/j.jms.2025.112022

Bales, Kristin N; Swarna, Akhila; O'Brien, James J; O'Brien, Leah C (June 2025, Journal of Molecular Spectroscopy)

The (0,0) and (0,1) bands of the A1 – X0+ and B1 – X0+ transitions of tungsten monoxide (WO) have been recorded in high resolution using intracavity laser absorption spectroscopy techniques (ILS and ILS-FTS). Lines for all four abundant isotopologues, 182WO, 183WO, 184WO, and 186WO, are observed and have been rotationally analyzed and fit using a constrained-variables approach in PGOPHER. While these transitions have been previously described in the literature, this new analysis incorporates all four isotopologues and presents evidence for an avoided crossing interaction between the v = 0 vibrational levels of the A1 and B1 states. New values for spectroscopic constants that incorporate the perturbation interactions are presented and compared to literature results.
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Free, publicly-accessible full text available June 1, 2026
Rotational and deperturbation analysis of the (0,0) and (1,0) vibrational bands of the [15.30]1 – X 3Σ–(0+) transition of WS

https://doi.org/10.1016/j.jms.2022.111702

Bales, Kristin N.; Harms, Jack C.; O'Brien, James J.; O'Brien, Leah C. (September 2022, Journal of Molecular Spectroscopy)

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Analysis of the (0,0) band of the new [15.3]Ω=3/2 – X 2Π3/2 electronic transition of PtF using intracavity laser spectroscopy

https://doi.org/10.1016/j.jms.2021.111517

Welch, Caroline A.; Harms, Jack C.; O'Brien, James J.; O'Brien, Leah C. (July 2021, Journal of Molecular Spectroscopy)

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Analysis of the newly observed [15.05]0+ – X3Σ–(0+) transition of WS observed using intracavity laser spectroscopy with Fourier-transform detection

https://doi.org/10.1016/j.jms.2021.111430

Bales, Kristin N.; Harms, Jack C.; O'Brien, James J.; O'Brien, Leah C. (March 2021, Journal of Molecular Spectroscopy)

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Primary saturation of α, β-unsaturated carbonyl containing fatty acids does not abolish electrophilicity

https://doi.org/10.1016/j.cbi.2021.109689

Snyder, Nathaniel W.; O'Brien, James; Singh, Bhupinder; Buchan, Gregory; Arroyo, Alejandro D.; Liu, Xiaojing; Bostwick, Anna; Varner, Erika L.; Angajala, Anusha; Sobol, Robert W.; et al (December 2021, Chemico-Biological Interactions)

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Intracavity laser spectroscopy with Fourier-transform detection of tungsten sulfide, WS: Analysis of the (1,0) band of the [13.10] Ω = 1 − X 3Σ–0+ transition

https://doi.org/10.1016/j.jms.2020.111349

Harms, Jack C.; Ratay, Brendan M.; Bales, Kristin N.; O'Brien, James J.; O'Brien, Leah C. (July 2020, Journal of Molecular Spectroscopy)

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Identification of two new electronic transitions of TaF using intracavity laser spectroscopy

https://doi.org/10.1016/j.jms.2019.111208

Bales, Kristin N.; Harms, Jack C.; O'Brien, Leah C.; O'Brien, James J. (November 2019, Journal of Molecular Spectroscopy)

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Environmental Engel Curves: Indirect Emissions of Common Air Pollutants

https://doi.org/10.1162/REST_a_00736

Levinson, Arik; O'Brien, James (March 2018, The Review of Economics and Statistics)

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