State-selective angular-differential single-electron capture in very slow Ar sup 4+ -Ar collisions
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (USA)
OSTI ID:6203436
- Department of Physics, University of Tennessee, Knoxville, TN (USA) Oak Ridge National Laboratory, Oak Ridge, TN (USA)
- Manne Siegbahn Institute for Physics, Stockholm (Sweden)
- Institut fuer Kernphysik der J. W. Goethe Universitaet, Frankfurt am Main (Federal Republic of Germany)
State-resolved angular distributions for single-electron capture in very-slow collisions (0.5--5 eV/amu) of Ar{sup 4+} and Ar have been measured with a new experimental apparatus. The energy-gain spectra show that single-electron capture populates the 4p level, while no capture to 4s is observed in this energy range. The 4p angular distribution has a single maximum close to 0{degree} for energies larger than about 100 eV. At lower energies a second maximum develops and forward scattering is suppressed. The secondary maximum moves to larger scattering angles as the collision energy is lowered and below about 60 eV a third maximum appears. The positions of the primary and the secondary peaks as functions of the collision energy are reproduced by semiclassical calculations of the angular differential cross section.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6203436
- Report Number(s):
- CONF-890708--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 205:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ARGON
ARGON IONS
ATOM COLLISIONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
DATA
DISTRIBUTION
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
NONMETALS
NUMERICAL DATA
P STATES
RARE GASES
S STATES
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ARGON
ARGON IONS
ATOM COLLISIONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
DATA
DISTRIBUTION
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
NONMETALS
NUMERICAL DATA
P STATES
RARE GASES
S STATES