Up-down asymmetry of the electrons ejected from barium 6p{sub 1/2}nk autoionizing states

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.033413· OSTI ID:21450581

Nunkaew, J; Gallagher, T F ^[1]

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1. Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)

We have measured the ejected electron signals from Ba 6p{sub 1/2}nk autoionizing Stark states, of n=28 and 29, produced by linearly polarized laser excitation in weak electric fields. These states do not have well-defined parities and as a result do not lead to angular distributions which are up-down symmetric with respect to the laser polarization direction. The weakness of the electric field makes the observation of the up-down asymmetry of the ejected electrons possible. We observe that the electrons from Ba 6p{sub 1/2}nk autoionizing red states are ejected in the upfield direction, while the electron from Ba 6p{sub 1/2}nk autoionizing blue states are ejected in the downfield direction.

• OSTI ID: 21450581
• Journal Information: Physical Review. A, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevA.82.033413; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ASYMMETRY
AUTOIONIZATION
BARIUM
ELECTRIC FIELDS
ELECTRONS
ENERGY LEVELS
EXCITATION
LASER RADIATION
PARITY
PHOTON-ATOM COLLISIONS
POLARIZATION
STARK EFFECT
ALKALINE EARTH METALS
ATOM COLLISIONS
COLLISIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FERMIONS
IONIZATION
LEPTONS
METALS
PARTICLE PROPERTIES
PHOTON COLLISIONS
RADIATIONS