Quasi-diatomic approach to the collisions of low-keV molecular

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5375437

Yenen, O

The polarization of L/sub ..cap alpha../ radiation is measured in coincidence with a charged particle scattered at specific laboratory angles, resulting from the collision-induced dissociation of low-keV H/sub 2//sup +/ and H/sub 3//sup +/ incident on target gases. Coincidence measurements of the polarization pattern are made for a variety of scattering angles for 3.22-keV H/sub 2//sup +/ incident on He and Ne, and for 4.83-keV H/sub 3//sup +/ incident on He. The molecular states excited during the collision are determined from the alignment of the observed polarization patterns. A quasi-diatomic collision model, which is an extension of the electron-promotion model of ion-atom collisions at low keV energies to molecule-atom collisional systems, is developed to interpret the experimental results. The rules of building simple quasi-diatomic correlation diagrams, to qualitatively estimate the dynamical behavior of molecular collisions, are presented. The general idea of treating the molecule as an atom under certain circumstances, is applied to a molecular two-state calculation of the differential charge-transfer probabilities in H/sup +/ -H/sub 2/ collisions. This calculation reproduces the essential features of previous experiments.

• Research Organization: Nebraska Univ., Lincoln (USA)
• OSTI ID: 5375437
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CATIONS
CHARGE TRANSPORT
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HELIUM
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
HYDROGEN IONS 2 PLUS
HYDROGEN IONS 3 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
MATHEMATICAL MODELS
MOLECULAR IONS
MOLECULE COLLISIONS
MOLECULES
NEON
NONMETALS
RARE GASES