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20 April 2024 |
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Emitter-site selective photoelectron circular dichroism of trifluoromethyloxirane | | M. Ilchen
; G. Hartmann
; P. Rupprecht
; A. N. Artemyev
; R. N. Coffee
; Z. Li
; H. Ohldag
; H. Ogasawara
; T. Osipov
; D. Ray
; Ph. Schmidt
; T. J. A. Wolf
; A. Ehresmann
; S. Moeller
; A. Knie
; Ph. V. Demekhin
; | | Date: |
7 Apr 2017 | | Abstract: | The angle-resolved inner-shell photoionization of R-trifluoromethyloxirane,
C3H3F3O, is studied experimentally and theoretically. Thereby, we investigate
the photoelectron circular dichroism (PECD) for nearly-symmetric O 1s and F 1s
electronic orbitals, which are localized on different molecular sites. The
respective dichroic $eta_{1}$ and angular distribution $eta_{2}$ 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
$eta_{1}$ of up to about 9% for the K-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. | | Source: | arXiv, 1704.2265 | | Services: | Forum | Review | PDF | Favorites | |
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