Photodetachment microscopy of the P, Q, and R branches of the OH(-)(v=0) to OH(v=0) detachment threshold

Fabienne Goldfarb; Cyril Drag; Walid Chaibi; Sophie Kröger; Christophe Blondel; Christian Delsart

doi:10.1063/1.1824904

Photodetachment microscopy of the P, Q, and R branches of the OH(-)(v=0) to OH(v=0) detachment threshold

J Chem Phys. 2005 Jan 1;122(1):14308. doi: 10.1063/1.1824904.

Authors

Fabienne Goldfarb¹, Cyril Drag, Walid Chaibi, Sophie Kröger, Christophe Blondel, Christian Delsart

Affiliation

¹ Laboratoire Aimé-Cotton, Centre National de la Recherche Scientifique, Bâtiment 505, F-91405 Orsay cedex, France.

PMID: 15638660
DOI: 10.1063/1.1824904

Abstract

A photodetachment experiment is performed on the v=0-->v=0 OH(-) detachment threshold. The weak O and S branches provide a signal strong enough to make amplitude measurements on all five O, P, Q, R, and S branches possible, which are used to fix the formulas for their relative intensities. Photodetachment microscopy is applied to 15 different thresholds of the P, Q, and R branches. The quantitative analysis of the interference patterns obtained does not show any effect of the dipole moment of OH, but yields a new measurement of the rotational parameters of OH(-)(v=0) and of the electron affinity of the molecule. The new recommended value for the electron affinity of (16)O(1)H is 14 740.982(7) cm(-1) or 1.827 648 7(11) eV.