Quenching of low-lying Rydberg states of Na colliding with ground-state He: A semiclassical approach

Journal Article · Wed Feb 01 00:00:00 EST 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.1020· OSTI ID:6533097

Kumar, A; Lane, N F; Kimura, M

The molecular expansion method within the framework of the semiclassical approximation is applied to quenching of low-lying excited states of Rydberg atoms colliding with ground-state He at thermal energies. Interactions between the colliding atoms are accounted for in terms of pseudopotentials, and their relative motion is described by a classical linear trajectory. A fairly large basis set of Slater-type orbitals is used to obtain molecular eigenstates, and subsequently a 14-state close-coupling calculation is performed to evaluate the total quenching cross sections and the contributions of individual transitions. The energy dependence of the calculated cross sections is investigated, and possible mechanisms responsible for individual transitions are explained. Finally, the collision rates are calculated and compared with experimental results.

• Research Organization: Department of Physics, Rice Quantum Institute, Rice University, Houston, Texas 77251
• OSTI ID: 6533097
• Journal Information: Phys. Rev. A; (United States), Vol. 39:3
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ATOM-ATOM COLLISIONS
SODIUM
RYDBERG STATES
QUENCHING
SEMICLASSICAL APPROXIMATION
TOTAL CROSS SECTIONS
ALKALI METALS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
METALS
NONMETALS
RARE GASES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena