Electron-impact excitation of atoms in high-lying doubly excited states: Correlation effects in collision dynamics

Journal Article · Fri Jul 15 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.670· OSTI ID:7194065

Motoyama, T; Koyama, N; Matsuzawa, M

Based on the hyperspherical approach, we have calculated the generalized oscillator strengths and the electron-impact-excitation Born cross sections from the initial /sup 1/S/sup e/ high-lying doubly excited states to the final /sup 1/P/sup o/ and /sup 1/D/sup e/ high-lying doubly excited ones. Together with the previous results on the /sup 1/S/sup e/-/sup 1/S/sup e/ excitation processes, we have found a simple propensity rule that the excitation processes with ..delta..n/sub 2/ = 0 are most likely to take place within each manifold, i.e., the S-S, S-P, or S-D excitation process where n/sub 2/ is the radial bending quantum number, i.e., the number of the nodes of the bending vibrational wave functions on the body fixed frame based on the rovibrator model of the doubly excited states. In addition to the propensity rule, ..delta..n/sub 2/ = 0, we have also found a set of propensity rules, i.e., ..delta..v = ..delta..T = 0 for angular correlation and ..delta..A = 0 for radial correlation according to the rovibrational model where v is the bending vibrational quantum number, T is the vibrational angular momentum, and A is the radial correlation quantum number.

• Research Organization: Department of Engineering Physics, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182, Japan
• OSTI ID: 7194065
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CORRELATIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
FORBIDDEN TRANSITIONS
GASES
HELIUM
NONMETALS
OSCILLATOR STRENGTHS
RARE GASES
SELECTION RULES