Resonant coherent excitation and ionization of fast hydrogenic ions by a crystal surface. Theory of triatomic molecule nonrigid crystal surface inelastic scattering dynamics: Approximate methods and applications to resonance and adsorption. Diatomic-diatomic molecular reactive scattering dynamics in gas phase
Coherent excitation of fast hydrogenic ions with velocity near 10{sup 9} cm/s by a crystal surface is investigated. Electronic transitions of the ion induced by the crystal potential are calculated for both the cases that nucleus of the ion travels above and below the surface. lonization probabilities of the hydrogenic ions, with atomic number between 4 and 9, impinging upon a crystal at grazing angle are also calculated. For incident ions at near-resonance velocity, transition probabilities from 2{ell}m and 3{ell}m states to the continuum states exhibit high peaks. As a result of ionization, the efficiency of coherent excitation of the ions by a crystal is greatly reduced. Based on the present ionization data, the author points out some possible methods to enhance stimulated emission of soft X-rays by a crystal surface. Based on the time-independent scattering theory, he presents a systematic formulation of the triatomic molecule-crystalline surface scattering dynamics including the vibrational states of the solid (phonon) and the vibrational and rotational states of the molecular projectile. From the translational invariance of the full Hamiltonian, we employ the total (projectile {plus} phonon) momentum representation parallel to th* surface to derive the properties of the total scattering wave func tion of the triatomic molecule-crystalline surface system, a representation of the simultaneous phonon and vib-rotation transition potential matrix. Bound state resonance scattering of a triatomic molecule-surface system and the quantal trapping/physisorption probabilities of the molecule are presented. A three-dimensional coupled channel transition matrix formulation for the diatomic-diatomic molecular reactive scattering is presented. The entrance and exit channel wave functions are obtained from the inelastic vibrational close-coupling approximation. Final rotational states are summed analytically.
- Research Organization:
- California Univ., Riverside, CA (USA)
- OSTI ID:
- 5844057
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
IONS
COLLISIONS
MOLECULES
SURFACES
ION COLLISIONS
MOLECULE COLLISIONS
CRYSTALS
ENERGY-LEVEL TRANSITIONS
HYDROGEN IONS
INELASTIC SCATTERING
IONIZATION
ISOELECTRONIC ATOMS
SCATTERING
SOFT X RADIATION
SOLIDS
VELOCITY
ATOMS
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
RADIATIONS
X RADIATION
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)