State-selection and orientation of CH radicals by an electric hexapole
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Corresponding author: a email@example.com
Revised: 18 November 2005
Published online: 10 January 2006
A pure and high intense pulsed supersonic CH (X2Π ) radical beam source was developed via the C(1D) + H2 reaction. An electrostatic hexapole field was used to state-select CH radicals. The focusing curves for the single rotational states of CH were measured for the first time by a saturated laser-induced fluorescence (SLIF) spectroscopy for the R-branch in A2Δ3/2 ← X2Π 1/2 transition. The focusing curves were simulated by the classical trajectory simulation based on a Stark energy analysis of the rotational energy levels, including spin-orbit and Λ-doubling coupling effects. In addition, orientational distribution functions were calculated for the selectable states.
PACS: 39.10.+j – Atomic and molecular beam sources and techniques
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006