Journal articles
Bound and resonance states of the dipolar anion of hydrogen cyanide: competition between threshold effects and rotation in an open quantum system
Abstract : Bound and resonance states of the dipole-bound anion of hydrogen cyanide HCN- are studied
using a non-adiabatic pseudopotential method and the Berggren expansion technique involving
bound states, decaying resonant states, and non-resonant scattering continuum. We devise an
algorithm to identify the resonant states in the complex energy plane. To characterize spatial
distributions of electronic wave functions, we introduce the body-fixed density and use it to assign
families of resonant states into collective rotational bands. We find that the non-adiabatic coupling
of electronic motion to molecular rotation results in a transition from the strong-coupling to weak-
coupling regime. In the strong coupling limit, the electron moving in a subthreshold, spatially
extended halo state follows the rotational motion of the molecule. Above the ionization threshold,
electron's motion in a resonance state becomes largely decoupled from molecular rotation. Widths
of resonance-band members depend primarily on the electron orbital angular momentum.
http://hal.in2p3.fr/in2p3-01103165
Contributor : Michel Lion <>
Submitted on : Wednesday, January 14, 2015 - 10:55:03 AM
Last modification on : Friday, June 12, 2020 - 5:33:47 PM
Contributor : Michel Lion <>
Submitted on : Wednesday, January 14, 2015 - 10:55:03 AM
Last modification on : Friday, June 12, 2020 - 5:33:47 PM
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