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- W2894967577 abstract "In multipole-bound anions, the excess electron is attached by a short-range multipole potential of a neutral molecule. Such anions are prototypical marginally-bound open quantum systems. In particular, around the critical multipole moment required to attach the valence electron, multipole-bound anions exhibit critical behavior associated with a transition from bound states dominated by low-$ell$ partial waves to the electron continuum. In this work, multipole-bound anions are described using a nonadiabatic electron-plus-rotor model. The electron-molecule pseudo-potential is represented by a short-range multipole field with a Gaussian form-factor. The resulting coupled-channel Schrodinger equation is solved by means of the Berggren expansion method, in which the electron's wave function is decomposed into bound states, narrow resonances, and the non-resonant scattering continuum. We show that the Gaussian model predicts the critical transition at the detachment threshold. Resonant states, including bound states, decaying resonances, subthreshold resonances, and antibound states are studied, and exceptional points where two resonant states coalesce are predicted. We discuss the transition of rotational band structures around the threshold and study the effects of channel coupling on the decay width of resonant poles." @default.
- W2894967577 created "2018-10-12" @default.
- W2894967577 creator A5029111186 @default.
- W2894967577 creator A5069374545 @default.
- W2894967577 creator A5087129267 @default.
- W2894967577 date "2018-12-21" @default.
- W2894967577 modified "2023-10-14" @default.
- W2894967577 title "Resonant spectra of multipole-bound anions" @default.
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- W2894967577 doi "https://doi.org/10.1103/physreva.98.062515" @default.
- W2894967577 hasPublicationYear "2018" @default.
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