Hyperspherical coordinate theory of physical processes involving two electron systems
This thesis investigates the two electron systems, H/sup -/ and He, and their interaction with particles and with external fields using an adiabatic approximation in hyperspherical coordinates. The first study concerns the wave functions, energies, and binding energies for the lowest singlet states of H/sup -/ and He in uniform magnetic fields B < 10/sup 9/ G. A coupled expansion in one electron oblate spheroidal angle functions is used in order to treat the angular part of the wave functions. For the radial part of the wave functions, the separable, or adiabatic, approximation is employed. The second study concerns the electron detachment cross section for collisions of 0.5 MeV H/sup -/ projectiles on He targets. The first Born-approximation and the closure approximation are employed assuming that the H atom is left in the 1s state. Electron correlations within the H/sup -/ system are treated in the adiabatic approximation including, for the first time for this problem, angular correlations. The final study concerns the photoionization cross section for H/sup -/ and He using the single channel adiabatic approximation for both the initial and the final state. The cross sections for the processes H/sup -/ + ..gamma.. ..-->.. H(1s) + e/sup -/ and He + ..gamma.. ..-->.. He/sup +/ (1s) + e/sup -/ are calculated using the length formula as well as the acceleration formula.
- Research Organization:
- Nebraska Univ., Lincoln (USA)
- OSTI ID:
- 5679366
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electron doubly differential cross section for 0. 5-MeV H/sup -/-He detachment collisions
Hyperspherical coordinate theory of two electron atomic processes. Progress report, 1 August 1983-31 July 1984
Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
BINDING ENERGY
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON DETACHMENT
ELEMENTS
ENERGY
ENERGY RANGE
FLUIDS
FUNCTIONS
GASES
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
MAGNETIC FIELDS
NONMETALS
PHOTOIONIZATION
RARE GASES
WAVE FUNCTIONS