Bound and resonance states of the dipolar anion of hydrogen cyanide: Competition between threshold effects and rotation in an open quantum system

Fossez, K.; Michel, N.; Nazarewicz, W.; Płoszajczak, M.; Jaganathen, Y.

doi:10.1103/PhysRevA.91.012503

Title: Bound and resonance states of the dipolar anion of hydrogen cyanide: Competition between threshold effects and rotation in an open quantum system

Journal Article · Mon Jan 12 00:00:00 EST 2015 · Physical Review A - Atomic, Molecular, and Optical Physics

DOI:https://doi.org/10.1103/PhysRevA.91.012503· OSTI ID:1337827

Fossez, K. ^[1]; Michel, N. ^[1]; Nazarewicz, W. ^[2]; Płoszajczak, M. ^[1]; Jaganathen, Y. ^[3]

Grand Accelerateur National d'Ions Lourds (Large Heavy Ion National Accelerator) (GANIL), Caen (France). National Center for Scientific Research (CNRS). Alternative Energies and Atomic Energy Commission (CEA)
Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy. NSCL/FRIB Lab.; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Warsaw (Poland). Inst. of Theoretical Physics
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States). NSCL/FRIB Lab.

In this paper, bound and resonance states of the dipole-bound anion of hydrogen cyanide HCN^– are studied using a nonadiabatic pseudopotential method and the Berggren expansion technique involving bound states, decaying resonant states, and nonresonant 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 nonadiabatic 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, the electron's motion in a resonance state becomes largely decoupled from molecular rotation. Finally, the widths of resonance-band members depend primarily on the electron orbital angular momentum.

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Research Organization:: Michigan State Univ., East Lansing, MI (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Grand Accelerateur National d'Ions Lourds (Large Heavy Ion National Accelerator) (GANIL), Caen (France)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); French-U.S. Theory Inst. for Physics with Exotic Nuclei (FUSTIPEN) (United States)

Contributing Organization:: Univ. of Warsaw (Poland); Univ. of Tennessee, Knoxville, TN (United States)

Grant/Contract Number:: FG02-10ER41700; FG02-96ER40963; DEFG02-96ER40963

OSTI ID:: 1337827

Alternate ID(s):: OSTI ID: 1181360

Journal Information:: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 91, Issue 1; ISSN 1050-2947

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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