Inelastic collisional processes of molecules. Final report, 1 Nov 88-30 Apr 90
Technical Report
·
OSTI ID:5594663
Absolute apparent cross sections for electron-impact excitation out of the 2-triplet-S metastable level of He to the 3-triplet-S, 4-triplet-S, 3-triplet-P, 3-triplet-D, 5-triplet-D, and 6-triplet-D levels have been measured by a novel method. A beam of metastable atoms from a hollow-cathode discharge was crossed by an electron beam of energy from 3 to 16 eV, and the emission from the excited states was detected. Absolute calibration was made by measuring the ratio of electron excitation cross section to the known optical absorption cross section and using knowledge of the pertinent branching ratios. Direct electron-impact excitation cross sections for the 3-triplet-P, 3-triplet-S, and 3-triplet-D, levels were obtained.
- Research Organization:
- Wisconsin Univ., Madison, WI (United States). Plasma Physics Research
- OSTI ID:
- 5594663
- Report Number(s):
- AD-A-231898/8/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMS
BEAMS
CALIBRATION
CATHODES
COLLISIONS
CROSS SECTIONS
ELECTRODES
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM
LEPTON BEAMS
METASTABLE STATES
MOLECULES
NONMETALS
OPTICAL PROPERTIES
PARTICLE BEAMS
PHYSICAL PROPERTIES
RARE GASES
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMS
BEAMS
CALIBRATION
CATHODES
COLLISIONS
CROSS SECTIONS
ELECTRODES
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM
LEPTON BEAMS
METASTABLE STATES
MOLECULES
NONMETALS
OPTICAL PROPERTIES
PARTICLE BEAMS
PHYSICAL PROPERTIES
RARE GASES