- Previous Article
- Next Article
- Table of Contents
Journal of Chemical Physics, Vol.120, No.10, 4553-4556, 2004
Photoelectron circular dichroism in core level ionization of randomly oriented pure enantiomers of the chiral molecule camphor
The inner-shell photoionization of unoriented camphor molecules by circularly polarized light has been investigated from threshold to a photoelectron kinetic energy of similar to65 eV. Photoelectron spectra of the carbonyl C 1s orbital, recorded at the magic angle of 54.7degrees with respect to the light propagation direction, show an asymmetry of up to 6% on change of either the photon helicity or molecular enantiomer. These observations reveal a circular dichroism in the angle resolved emission with an asymmetry between forward and backward scattering (i.e., 0degrees and 180degrees to the light beam) which can exceed 12%. Since the initial state is an atomiclike spherically symmetric orbital, this strongly suggests that the asymmetry is caused by final-state effects dependent on the chiral geometry of the molecule. These findings are confirmed by electron multiple scattering calculations of the photoionization dynamics in the electric-dipole approximation. (C) 2004 American Institute of Physics.