Resonances in the inelastic cross section of helium
Technical Report
·
OSTI ID:7286674
This paper presents experimental evidence for structure in the inelastic cross section in helium which is interpreted in terms of compound states above the lowest electronically excited state. A study of the inelastically scattered electrons at an angle of 72 deg shows that structure in the 2-3S cross section exists for electron energies around 21 eV and 22.4 eV. It was suggested that the shape of the 2-3S excitation function is consistent with the existence of a compound state in the vicinity of the threshold of the 2-3S state. The existence of such compound states may be detected either in elastic or in inelastic scattering, or possibly in both channels. The classification of the state is 1s(2s). This paper reports the results of a search for similar resonances in the inelastic excitation of helium. (Author)
- Research Organization:
- Westinghouse Research Labs., Pittsburgh, Pa. (USA)
- OSTI ID:
- 7286674
- Report Number(s):
- AD-446725
- 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
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
EXCITATION FUNCTIONS
FLUIDS
HELIUM
INELASTIC SCATTERING
NONMETALS
RARE GASES
RESONANCE
SCATTERING
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
EXCITATION FUNCTIONS
FLUIDS
HELIUM
INELASTIC SCATTERING
NONMETALS
RARE GASES
RESONANCE
SCATTERING