Absolute cross sections for dissociative recombination of HD{sup +}: Comparison of experiment and theory

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.52.R4320· OSTI ID:147813

Stroemholm, C; Schneider, I F; Sundstroem, G; Carata, L; Danared, H; Datz, S; Dulieu, O; Kaellberg, A; af Ugglas, M; Urbain, X; Zengin, V; Suzor-Weiner, A; Larsson, M ^[1]

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1. Department of Physics I, Royal Institute of Technology (KTH), S-100 44 Stockholm (Sweden)

Absolute cross sections for dissociative recombination of HD{sup +} were measured in the ion storage CRYRING for incident electron energies in the range 0.01--20 eV. The ions were stored for about 25 s before data taking, which is several orders of magnitude longer than their vibrational lifetimes towards spontaneous emission of infrared radiation. A broad resonance in the cross section at 5--12 eV is due to recombination into a manifold of doubly excited states. Multichannel quantum-defect theory was used to calculate the absolute cross section of this resonance. The calculations required inclusion of different mechanisms, such as dissociative autoionization, and many molecular states in order to reproduce the resonance region. Very good agreement of experiment and theory is found, and the results strongly reinforce that vibrationally cold ions were used in the experiment.

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 147813
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
AUTOIONIZATION
CROSS SECTIONS
DISSOCIATION
ELECTRON-ION COLLISIONS
ELECTRON-MOLECULE COLLISIONS
EV RANGE 01-10
EV RANGE 10-100
EXCITATION
EXCITED STATES
HYDROGEN DEUTERIDE
INFRARED RADIATION
MOLECULAR IONS
RECOMBINATION