Determination of rank 4 multipoles and of the partial cross sections for He(3[sup 1][ital D]) excitation by electron impact

Journal Article · Mon Jul 12 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.235· OSTI ID:6186702

Mikosza, A G; Hippler, R; Wang, J B; Williams, J F ^[1]

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1. Department of Physics, Centre for Atomic, Molecular, and Surface Physics, The University of Western Australia, Nedlands, Perth, Australia 6009 ( )

We report the first measurements of a rank 4 state multipole for He(3[sup 1][ital D]) excitation by electron impact with a polarized photon-photon coincidence technique. Our results allow, for the first time, the extraction of partial cross sections [sigma][sub [ital m]] for He(3[sup 1][ital D][sub [ital m]]) excitation ([ital m]=0, [plus minus]1, [plus minus]2) which are not otherwise available. The present results put stringent tests on existing theories and, for example, point in the theoretical calculations to an overestimation of the partial cross section [sigma][sub 2].

• OSTI ID: 6186702
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:2; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BOSONS
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
INFORMATION
MASSLESS PARTICLES
MULTI-PHOTON PROCESSES
MULTIPOLES
NONMETALS
NUMERICAL DATA
PHOTONS
POLARIZATION
RARE GASES