Quantal and semiclassical methods of slow ion-atom scattering with applications to Ne(/sup 4 +/) + He

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7149093

Tan, J

The dynamics of low-energy ion-atom collisions is investigated at a two-state level of approximation. The author proposes a new semiclassical method based upon the two-level theory in spinor representation. The new approach presents a more-transparent picture of the present ion-atom scattering for the charge-transfer process. The new results for the transition probability of the system Ne/sup 4 +/ +He compare very well with existing full quantum-mechanical methods. Particularly, a new view of the S-matrix is given as a rotation operator which serves to rotate the scattering state. Finally, the single charge-transfer differential cross-sections (sigma(Theta)) are calculated at laboratory impact energies from 220 eV to 500 eV for the same system (Ne/sup 4 +/ + He) and are compared with the recent experimental data of Tunnell et al. The calculations explain the experimental data both in quality and quantity. The model scattering potential is used in the sigma(Theta) calculation and its construction is discussed.

• Research Organization: Kansas State Univ., Manhattan (USA)
• OSTI ID: 7149093
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CHARGE TRANSPORT
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DYNAMICS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUIDS
GASES
HELIUM
HELIUM IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MECHANICS
MULTICHARGED IONS
NONMETALS
POTENTIALS
QUANTUM MECHANICS
RARE GASES
SCATTERING