Theoretical study of the dissociative recombination of HeH{sup +}

Journal Article · Sun Aug 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.022709· OSTI ID:20645899

Takagi, Hidekazu ^[1]

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1. Center for Natural Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 228-8550 (Japan)

The dissociative recombination (DR) of HeH{sup +} is studied using the multichannel quantum defect theory (MQDT) of molecules. The MQDT is extended to include the dissociative Rydberg states. The idea of a 'closed dissociative channel' is introduced for a precise description. The calculated DR cross section sensitively depends upon rotational motion, which enhances the DR at a collision energy lower than 0.2 eV. Calculations in the present study reproduced the DR rate coefficient measured by two facilities of storage rings (CRYRING and TARN II). A great change of the adiabatic quantum defect with internuclear distance induced a large DR cross section in the noncrossing system. This mechanism is an alternative to the electronic resonance of the crossing existing system.

• OSTI ID: 20645899
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CATIONS
CROSS SECTIONS
DEFECTS
DISSOCIATION
DISTANCE
EV RANGE
HELIUM COMPOUNDS
MOLECULES
RECOMBINATION
RESONANCE
ROTATIONAL STATES
RYDBERG STATES
STORAGE RINGS