Correlation of polarization analyzed photons with scattered hydrogen atoms formed in proton-helium collisions

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6487484

Mueller, D W

Photon polarizaton analysis and coincidence techniques have been used to determine the relative importance of rotational and radial coupling for charge transfer in proton-helium collisions. Polarization analysis of the L/sub alpha/ photon from the 2p-1s transition of the excited hydrogen atom, formed by charge transfer, indicates the relative importance of the two coupling mechanisms in the same order of magnitude. Coincidence measurements of the polarization pattern are made for a variety of scattering angles at proton energies of 4 keV, 5 keV and 8 keV. The scattering angle is then related to an impact parameter. The experimental results presented here suggest the primary mechanism for charge transfer to H(2p) is through an intermediate state by coupling at a diabatic molecular potential curve crossing. Calculations of the amplitudes associated with this coupling are made by application of the Landau-Zener model with allowance for rotational coupling. The calculated values agree with the experimental magnitudes of the relative magnetic substate cross sections, but do not agree with the measured relative phase for the amplitudes. A model for the origin of the observed phase is presented.

• Research Organization: Nebraska Univ., Lincoln (USA)
• OSTI ID: 6487484
• 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 EXCHANGE
CHARGED PARTICLES
COLLISIONS
COUPLING
DATA
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
MASSLESS PARTICLES
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
PHOTONS
POLARIZATION
RARE GASES
SCATTERING