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

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

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  • Media type: E-Article
  • Title: Communication: Magnetic dipole transitions in the OH A 2Σ+ ← X 2Π system
  • Contributor: Kirste, Moritz; Wang, Xingan; Meijer, Gerard; Gubbels, Koos B.; van der Avoird, Ad; Groenenboom, Gerrit C.; van de Meerakker, Sebastiaan Y. T.
  • Published: AIP Publishing, 2012
  • Published in: The Journal of Chemical Physics, 137 (2012) 10
  • Language: English
  • DOI: 10.1063/1.4751475
  • ISSN: 0021-9606; 1089-7690
  • Keywords: Physical and Theoretical Chemistry ; General Physics and Astronomy
  • Origination:
  • Footnote:
  • Description: 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 2Π3/2, 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.