Differential scattering cross sections for collisions of 0. 5-, 1. 5-, and 5. 0-keV helium atoms with He, H/sub 2/, N/sub 2/, and O/sub 2/

Journal Article · Mon Nov 01 04:00:00 EST 1954 · J. Geophys. Res.; (United States)

OSTI ID:6238063

Newman, J H; Smith, K A; Stebbings, R F; Chen, Y S

This paper reports the first results of an experimental program established to provide cross section data for the use in modeling various atmospheric processes. Absolute cross sections, differential in the scattering angle, have been measured for collisions of 0.5-, 1.5-, and 5.0-keV helium atoms with He, H/sub 2/, N/sub 2/, and O/sub 2/ at laboratory scattering angles between 0.1/sup 0/ and 5/sup 0/. The results are the sums of cross sections for elastic and inelastic scattering of helium atoms; charged collision products are not detected. Integration of the differential cross section data yields integral cross sections consistent with measurements by other workers. The apparatus employs a position-sensitive detector for both primary and scattered particles and uses a short target cell with a large exit aperture to ensure a simple and well-defined apparatus geometry.

• Research Organization: Department of Space Physics and Astronomy, Rice Quantum Institute, Rice University, Houston, Texas
• OSTI ID: 6238063
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 90:A11; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
EARTH ATMOSPHERE
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HYDROGEN
INFORMATION
KEV RANGE
KEV RANGE 01-10
MOLECULE COLLISIONS
NITROGEN
NONMETALS
NUMERICAL DATA
OXYGEN
RARE GASES