Communication: Magnetic dipole transitions in the OH A 2Σ+ ← X2Π system

Kirste, Moritz; Wang, Xingan; Meijer, Gerard; Gubbels, Koos; van der Avoird, Ad; Groenenboom, Gerrit C.; Meerakker, Sebastiaan Y. T. van de

doi:10.1063/1.4751475

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Communication: Magnetic dipole transitions in the OH A ²Σ⁺ ← X²Π system

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Kirste, Moritz
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Wang, Xingan
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer, Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Gubbels, Koos
Molecular Physics, Fritz Haber Institute, Max Planck Society;
Institute of Theoretical Physics, University of Cologne;
Radboud University Nijmegen, Institute for Molecules and Materials;

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Meerakker, Sebastiaan Y. T. van de
Molecular Physics, Fritz Haber Institute, Max Planck Society;
Radboud University Nijmegen, Institute for Molecules and Materials;

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Citation

Kirste, M., Wang, X., Meijer, G., Gubbels, K., van der Avoird, A., Groenenboom, G. C., et al. (2012). Communication: Magnetic dipole transitions in the OH A ²Σ⁺ ← X²Π system. Journal of Chemical Physics, 137(10): 101102. doi:10.1063/1.4751475.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-1090-F

Abstract

We report on the observation of magnetic dipole allowed transitions in the well-characterized A ²Σ⁺ − X ²Π band system of the OH radical. A Stark decelerator in combination with microwave Rabi spectroscopy is used to control the populations in selected hyperfine levels of both Λ-doublet components of the X ²Π_3/2, v = 0, J = 3/2 ground state. Theoretical calculations presented in this Communication predict that the magnetic dipole transitions in the A ²Σ⁺, v = 1 ← X ²Π, v = 0 band are weaker than the electric dipole transitions by a factor of 2.58 × 10³ only, i.e., much less than commonly believed. Our experimental data confirm this prediction.