Rotational and near-infrared spectra of PbF

Characterization of the coupled X1 Π1/2 2 and X2 Π3/2 2 states

verfasst von: Sean Jackson, Luke Kim, Andreas Biekert, Alex Nguyen, Richard J. Mawhorter, Trevor J. Sears, Leonid V. Skripnikov, Vera V. Baturo, Alexander N. Petrov, Jens Uwe Grabow
Abstract: Observations of the rotational spectrum of lead monofluoride, PbF, have been extended up to transitions in the v = 7 level for PbF208 in the lowest X1Π1/22 state of the radical and v = 5 for the Pb207 and Pb206 isotopologs. The data also include a few measurements for PbF204 at v = 0. These new measurements have been combined with existing near-IR measurements of the X2-X1 fine-structure transition and a simultaneous multi-isotope fit of the data to an effective isotope-independent rovibronic Hamiltonian has been carried out. The resulting parameters fully characterize the vibrational, rotational, and hyperfine structure of the combined X1/X2 state of the radical. A pair of opposite-parity levels with total angular momentum quantum number, F=1/2, in the lowest rotational level, J=1/2, of PbF207 are close in energy and their spacing decreases with vibrational excitation. The experimental results show the spacing decreases to less than 20 MHz at v=7 and 8. The experimental work is complemented by new ab initio calculations which support the results and allow predictions outside the experimental data range. The calculated radiative lifetimes of the relevant vibrationally excited states are of the order of 50 ms. This paper was motivated by interest in using PbF207 as a vehicle for future probes of the standard model of physics such as placing limits on the electrons electric dipole moment (eEDM), eEDM calibration, molecular charge-parity nonconservation, and Born-Oppenheimer breakdown effects for example.
Organisationseinheit(en): Institut für Physikalische Chemie und Elektrochemie
Externe Organisation(en): Pomona College
Stony Brook University (SBU)
RAS - Saint Petersburg Nuclear Physics Institute
Staatliche Universität Sankt Petersburg
Typ: Artikel
Journal: Physical Review A
Band: 110
ISSN: 2469-9926
Publikationsdatum: 10.2024
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Atom- und Molekularphysik sowie Optik
Elektronische Version(en): https://doi.org/10.1103/PhysRevA.110.042808 (Zugang: Geschlossen)

BibTeX

@article{bb42c531c924468c8c2e75227e39de7d,
title = "Rotational and near-infrared spectra of PbF: Characterization of the coupled X1 Π1/2 2 and X2 Π3/2 2 states",
abstract = "Observations of the rotational spectrum of lead monofluoride, PbF, have been extended up to transitions in the v = 7 level for PbF208 in the lowest X1Π1/22 state of the radical and v = 5 for the Pb207 and Pb206 isotopologs. The data also include a few measurements for PbF204 at v = 0. These new measurements have been combined with existing near-IR measurements of the X2-X1 fine-structure transition and a simultaneous multi-isotope fit of the data to an effective isotope-independent rovibronic Hamiltonian has been carried out. The resulting parameters fully characterize the vibrational, rotational, and hyperfine structure of the combined X1/X2 state of the radical. A pair of opposite-parity levels with total angular momentum quantum number, F=1/2, in the lowest rotational level, J=1/2, of PbF207 are close in energy and their spacing decreases with vibrational excitation. The experimental results show the spacing decreases to less than 20 MHz at v=7 and 8. The experimental work is complemented by new ab initio calculations which support the results and allow predictions outside the experimental data range. The calculated radiative lifetimes of the relevant vibrationally excited states are of the order of 50 ms. This paper was motivated by interest in using PbF207 as a vehicle for future probes of the standard model of physics such as placing limits on the electrons electric dipole moment (eEDM), eEDM calibration, molecular charge-parity nonconservation, and Born-Oppenheimer breakdown effects for example.",
author = "Sean Jackson and Luke Kim and Andreas Biekert and Alex Nguyen and Mawhorter, {Richard J.} and Sears, {Trevor J.} and Skripnikov, {Leonid V.} and Baturo, {Vera V.} and Petrov, {Alexander N.} and Grabow, {Jens Uwe}",
note = "Publisher Copyright: {\textcopyright} 2024 American Physical Society. ",
year = "2024",
month = oct,
doi = "10.1103/PhysRevA.110.042808",
language = "English",
volume = "110",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "4",
}