Valence photoionization dynamics in circular dichroism of chiral free molecules:The methyl-oxirane

摘要

The dynamical behavior of circular dichroism for valence photoionization processes in pure enantiomers of randomly oriented methyl-oxirane molecules has been studied by circularly polarized synchrotron radiation.Experimental results of the dichroism coefficient obtained for valence photoionization processes as a function of photon energy have been compared with theoretical values predicted by state-of-the-art ab initio density-functional theory.The circular dichroism measured at low electron kinetic energies was as large as 11%.Trends in the experimental dynamical behavior of the dichroism coefficients D_i(omega) have been observed.Agreement between experimental and theoretical results permits unambiguous identification of the enantiomer and of the individual orbitals.