Single-electron capture by multiply charged ions of carbon, nitrogen, and oxygen in atomic and molecular hydrogen

Journal Article · Wed Feb 01 00:00:00 EST 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.17.534· OSTI ID:5066084

Phaneuf, R A; Meyer, F W; McKnight, R H

Cross sections for electron capture by N/sup +q/, O/sup +q/ (1 < or = q < or = 5), and C/sup +q/ (1 < or = q < or = 4) incident on atomic and molecular hydrogen have been measured in the velocity range (0.3-5.2) x 10/sup 8/ cm/s. The capture cross sections for the higher incident charge states are large, in many cases exceeding 1 x 10/sup -15/ cm/sup 2/. For relative velocities above the Bohr velocity, all the measured cross sections were found to decrease monotonically with increasing velocity and to scale in magnitude roughly as q/sup 2/. Furthermore, for these higher velocities the cross sections for electron capture from H/sub 2/ are systematically larger than the corresponding cross sections for electron capture from H. For relative velocities below the Bohr velocity, no simple behavior of the measured cross sections was observed. The behavior of the cross sections at low velocities is discussed qualitatively using the Landau-Zener formalism. For higher velocities reasonable agreement was found with the classical trajectory Monte Carlo calculations of Olson and Salop.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5066084
• Journal Information: Phys. Rev., A; (United States), Vol. 17:2
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON IONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
HYDROGEN
NITROGEN IONS
OXYGEN IONS
CROSS SECTIONS
ELECTRON CAPTURE
MOLECULAR IONS
ATOM COLLISIONS
ATOMIC IONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
ION COLLISIONS
IONS
MOLECULE COLLISIONS
NONMETALS
640304* - Atomic
Molecular &amp; Chemical Physics- Collision Phenomena