Single-electron capture and direct scattering in He sup 2+ +D sub 2 , O sub 2 , and N sub 2

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.3503· OSTI ID:5847321

Martin, S J; Stevens, J; Pollack, E ^[1]

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1. Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046 (US)

Single-electron capture and direct scattering are investigated in He{sup 2+} collisions with D{sub 2}, O{sub 2}, and N{sub 2} molecules. For D{sub 2}, measurements are made at 2.0, 3.0, and 4.0 keV. At the smallest scattering angles, only the exothermic He{sup +}(1{ital s})+D{sub 2}{sup +*} channel is excited. Capture to He{sup +}({ital n}=2)+D{sub 2}{sup +}({ital X}) is found to have a threshold at a reduced scattering angle {tau} near 2 keV deg and its contribution rises rapidly. The direct scattering is primarily elastic. O{sub 2} is studied at 4.0 keV and the capture at small angles is dominated by the quasiresonant He{sup +}({ital n}=2)+O{sub 2}{sup +}({ital X} {sup 2}{Pi}{sub {ital g}}) and the exothermic He{sup +}(1{ital s})+O{sub 2}{sup +*} channels. The direct-scattering channel is electronically elastic for {tau}{lt}1.6 keV deg. N{sub 2} is studied at 4.0 keV. For {tau}{gt}1.0 keV deg electron capture dominates the collision. The capture is predominantly exothermic for {tau}{lt}1.2 keV deg.

• OSTI ID: 5847321
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:7; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CAPTURE
CHARGED PARTICLES
COLLISIONS
DEUTERIUM
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
HELIUM IONS
HYDROGEN ISOTOPES
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
ISOTOPES
KEV RANGE
KEV RANGE 01-10
LIGHT NUCLEI
MOLECULE COLLISIONS
NITROGEN
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXYGEN
SCATTERING
SMALL ANGLE SCATTERING
STABLE ISOTOPES