Series of Molecularlike Doubly Excited States of a Quasi-Three-Body Coulomb System
(2025) Physical Review Letters — Vol. 135, n° 15, p. 153002 (2025)
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- Authors
Jungers, M. 
Rosen, C. Eichmann, U.
- Abstract
- We investigated resonant multiphoton excitation of high-angular-momentum doubly excited states of the strontium atom, a quasi-three-body Coulomb system, both experimentally and theoretically. A series of highly doubly excited states converging to the double ionization threshold was identified and reproduced by first-principles calculations, which provided access to the two-electron wave functions of the resonances. In these states, the outer electron is dynamically localized at large distances by pendulumlike oscillations of the inner electron across the nucleus. A complementary simple molecularlike adiabatic model offers a clear interpretation of the correlated two-electron motion and suggests that the series is a general feature of highly doubly excited states of atoms and molecules.
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Citations
Génévriez, M., Jungers, M., Rosen, C., & Eichmann, U. (2025). Series of Molecularlike Doubly Excited States of a Quasi-Three-Body Coulomb System. Physical Review Letters, 135(15), 153002. https://doi.org/10.1103/svsd-9mj3 (Original work published 2025)