Journal article
Dissociative single and double photoionization with excitation between 37 and 69 eV in N₂

Publication Details
Ehresmann, A.; Machida, S.; Kitajima, M.; Ukai, M.; Kameta, K.; Kouchi, N.; Hatano, Y.; Shigemasa, E.; Hayaishi, T.
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Journal of Physics B: Atomic, Molecular and Optical Physics
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Dissociative single and double photoionization of N2 as a function of the exciting-photon energy has been investigated using monochromatized synchrotron radiation in the exciting-photon energy range between 37 and 69 eV by dispersed VUV fluorescence spectroscopy (80 nm ≤ λfl ≤ 200 nm). Relative partial emission cross sections for N I and N II fluorescence have been recorded as a function of the exciting-photon energy. There is strong evidence that the precursors of dissociative single ionization with one of the fragments being excited are the N2+g-1 2Σg+ state with its closely lying correlation states only. An approximately linear excess energy dependence of the cross sections for the molecular double photoionization into the N22+ D 1Σu+ state has been observed in the excitation spectrum of D 1Σu+ → X 1Σg+ fluorescence in N22+ close to its threshold. Evidence for dissociative double photoionization with excitation has been found.


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Last updated on 2019-25-07 at 11:15