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- W2947357053 abstract "It is shown that the M$^{2+}$ ion yield in the double photoionization of the aromatic hydrocarbons, pyrene and coronene, can be expressed as a superposition of a contribution from a resonance involving carbon atoms on the perimeter and coherent contributions from carbon atoms inside the perimeter. In the case of pyrene, the two interior atoms are associated with a resonance peak at 10 eV and linear behavior above 75 eV. The resonance peak is an optically excited state of the interior carbon pair. The linear behavior arises from the coherent emission of two electrons with equal energy and opposite momenta, as occurs in pyrrole. Coronene has a low energy peak along with two pairing resonances, however, the linear region as in the case of pyrene is absent. The low energy resonance is associated with the atoms on the perimeter and the high energy resonance is associated with the hexagonal array of six carbon atoms at the center of the molecule. It is proposed that the quasi-independence of the contributions from the perimeter and interior atoms is related to Huckel's Rule for the stability of aromatic hydrocarbons." @default.
- W2947357053 created "2019-06-07" @default.
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- W2947357053 date "2019-05-29" @default.
- W2947357053 modified "2023-09-27" @default.
- W2947357053 title "Independent-subsystem interpretation of the double photoionization of pyrene and coronene" @default.
- W2947357053 hasPublicationYear "2019" @default.
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