| Autor: |
Hockett, Paul, King, Adrian K., Powis, Ivan, Reid, Katharine L. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 10/21/2007, Vol. 127 Issue 15, p154307, 7p, 1 Black and White Photograph, 1 Diagram, 2 Charts, 2 Graphs |
| Abstrakt: |
Angle-resolved photoelectron spectra from rotationally selected à 1Au state acetylene have been recorded using velocity-map imaging. Several Renner-Teller split vibrational bands have been observed and assigned, showing good agreement with previous zero kinetic energy photoelectron (ZEKE) work [S. T. Pratt, P. M. Dehmer, and J. L. Dehmer, J. Chem. Phys. 99, 6233 (1993); S.-J. Tang, Y.-C. Chou, J. J.-M. Lin, and Y.-C. Hsu, ibid. 125, 133201 (2006).] The extracted photoelectron angular distributions (PADs) corresponding to these bands show a strong dependence on the vibronic angular momentum projection quantum number K+. Subbands with odd K+ show PADs with maximum intensity along the polarization vector of the ionizing laser beam, while those with even K+ show PADs with maximum intensity perpendicular to this direction. Velocity-map images recorded at low photoelectron energies approach rotational resolution of the ion, and the evolution of the PADs with increasing rotational level prepared in the à 1Au state indicates the potential of a “complete” determination of the photoionization dynamics of the à 1Au state. This is further investigated in the following paper. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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