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Zero kinetic energy photoelectron spectroscopy of jet cooled benzo[a]pyrene from resonantly enhanced multiphoton ionization

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dc.creator Zhang, Jie
dc.creator Harthcock, Colin
dc.creator Han, Fangyuan
dc.creator Kong, Wei
dc.date.accessioned 2012-06-06T17:20:24Z
dc.date.available 2012-06-06T17:20:24Z
dc.date.issued 2011-12-28
dc.identifier.citation Zhang, J., Harthcock, C., Han, F., & Konga, W. (2011, December 28). Zero kinetic energy photoelectron spectroscopy of jet cooled benzo[a]pyrene from resonantly enhanced multiphoton ionization. Journal of Chemical Physics, 135(24). doi:10.1063/1.3672161 en_US
dc.identifier.uri http://hdl.handle.net/1957/29674
dc.description This is the publisher’s final pdf. The published article is copyrighted by the American Institute of Physics and can be found at: http://jcp.aip.org/. en_US
dc.description.abstract We report zero kinetic energy (ZEKE) photoelectron spectroscopy of benzo[a]pyrene (BaP) via resonantly enhanced multiphoton ionization (REMPI). Our analysis concentrates on the vibrational modes of the first excited state (S₁) and those of the ground cationic state (D₀). Similar to pyrene, another peri-condensed polycyclic aromatic hydrocarbon we have investigated, the first two electronically excited states of BaP exhibit extensive configuration interactions. However, the two electronic states are of the same symmetry, hence vibronic coupling does not introduce any out-of-plane modes in the REMPI spectrum, and Franck-Condon analysis is qualitatively satisfactory. The ZEKE spectra from the in-plane modes observed in the REMPI spectrum demonstrate strong propensity in preserving the vibrational excitation of the intermediate state. Although several additional bands in combination with the vibrational mode of the intermediate state are identifiable, they are much lower in intensity. This observation implies that the molecular structure of BaP has a tremendous capability to accommodate changes in charge density. All observed bands of the cation are IR active, establishing the role of ZEKE spectroscopy in mapping out far infrared bands for astrophysical applications. en_US
dc.description.sponsorship This work is supported by the National Aeronautics and Space Administration under Award No. NNX09AC03G. en_US
dc.language.iso en_US en_US
dc.publisher American Institute of Physics en_US
dc.relation.ispartofseries Journal of Chemical Physics en_US
dc.relation.ispartofseries Vol. 135 no. 24 en_US
dc.title Zero kinetic energy photoelectron spectroscopy of jet cooled benzo[a]pyrene from resonantly enhanced multiphoton ionization en_US
dc.type Article en_US
dc.identifier.doi 10.1063/1.3672161


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