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

Autor: Kirste M; Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany., Wang X, Meijer G, Gubbels KB, van der Avoird A, Groenenboom GC, van de Meerakker SY
Jazyk: angličtina
Zdroj: The Journal of chemical physics [J Chem Phys] 2012 Sep 14; Vol. 137 (10), pp. 101102.
DOI: 10.1063/1.4751475
Abstrakt: We report on the observation of magnetic dipole allowed transitions in the well-characterized A (2)Σ(+) - X (2)Π 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 (2)Π(3/2), v = 0, J = 3/2 ground state. Theoretical calculations presented in this Communication predict that the magnetic dipole transitions in the A (2)Σ(+), v = 1 ← X (2)Π, v = 0 band are weaker than the electric dipole transitions by a factor of 2.58 × 10(3) only, i.e., much less than commonly believed. Our experimental data confirm this prediction.
Databáze: MEDLINE