Serial correlations in the excitation of helium levels in processes involving helium ions and atoms
Optical spectroscopy methods were used to measure the excitation cross sections of 26 states of the helium atom in a pairwise interaction of helium atoms and ions with a 0.5-keV energy. The feasibility of approximating the dependence of the excitation cross sections on the principal quantum number in the form sigma = An/sup -alpha/ was established, and the values of the coefficient ..cap alpha.. were found for the /sup 1//sup ,//sup 3/S, /sup 1/P and /sup 1//sup ,//sup 3/D states of the helium atom. The character of the dependence of the cross sections on the principal quantum number is compared for excitation of helium with metastable 2/sup 3/S atoms with a 0.5-keV energy and ions with a 0.5--50-keV energy.
- Research Organization:
- Cedars-Sinai Medical Center, Los Angeles, California 90048
- OSTI ID:
- 5013377
- Journal Information:
- Opt. Spectrosc. (Engl. Transl.); (United States), Journal Name: Opt. Spectrosc. (Engl. Transl.); (United States) Vol. 58:4; ISSN OPSUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMIC IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM
HELIUM IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
METASTABLE STATES
NONMETALS
RARE GASES