Abstract
The angle-resolved inner-shell photoionization of R-trifluoromethyloxirane, , is studied experimentally and theoretically. Thereby, we investigate the photoelectron circular dichroism (PECD) for nearly symmetric O and F electronic orbitals, which are localized on different molecular sites. The respective dichroic and angular distribution parameters are measured at the photoelectron kinetic energies from 1 to 16 eV by using variably polarized synchrotron radiation and velocity map imaging spectroscopy. The present experimental results are in good agreement with the outcome of ab initio electronic structure calculations. We report a sizable chiral asymmetry of up to about 9% for the -shell photoionization of oxygen atom. For the individual fluorine atoms, the present calculations predict asymmetries of similar size. However, being averaged over all fluorine atoms, it drops down to about 2%, as also observed in the present experiment. Our study demonstrates a strong emitter and site sensitivity of PECD in the one-photon inner-shell ionization of this chiral molecule.
- Received 31 March 2017
DOI:https://doi.org/10.1103/PhysRevA.95.053423
©2017 American Physical Society