Spin-tagged electron-hydrogen scattering: Ionization in the near-threshold region

Journal Article · Mon Oct 08 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.1857· OSTI ID:6139105

Guo, X Q; Crowe, D M; Lubell, M S; Tang, F C; Vasilakis, A; Slevin, J; Eminyan, M ^[1]

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1. Department of Physics, City College of the City University of New York, New York, NY (USA) Department of Experimental Physics, St. Patrick's College, Maynooth, Maynooth, County Kildare (United Kingdom) Laboratoire de Physique Atomique, Tour 24, Universite Paris VII, F-75251 Paris (France)

We use beams of polarized electrons and polarized hydrogen atoms to measure the ionization-rate asymmetry, {Delta}{sub {ital I}}=({ital R}({up arrow}{down arrow}){minus}{ital R}({up arrow}{up arrow}))/({ital R}({up arrow}{down arrow})+{ital R}({up arrow}{up arrow})), in the near-threshold region, where {ital R}({up arrow}{down arrow}) and {ital R}({up arrow}{up arrow}) are the ionization rates when the electron spin is antiparallel and parallel, respectively, to the atomic spins. Within 1.7 eV above threshold, our results reveal the presence of structure, which heretofore has not been predicted by any conventional theoretical calculation.

• OSTI ID: 6139105
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:15; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
ATOM COLLISIONS
BEAMS
COLLIDING BEAMS
COLLISIONS
CORRELATIONS
DATA
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
IONIZATION
LEPTON BEAMS
NONMETALS
NUMERICAL DATA
ORIENTATION
PARTICLE BEAMS
SPIN ORIENTATION
THRESHOLD ENERGY