Coherent excitation of cadmium J =0,1,2 autoionizing levels by electron impact

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.2281· OSTI ID:6045771

Martin, N L.S.; Thompson, D B ^[1]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (US)

We have measured ({ital e},2{ital e}) energy spectra in cadmium for the 4{ital d}{sup 9}5{ital s}{sup 2}5{ital p} {ital J}=1 autoionizing region. The ejected-electron energy range investigated was from 2.6 to 4.8 eV with an incident electron energy of 150 eV and a scattering angle of 3{degree}. Small differences were found in spectra taken at ejected-electron directions 180{degree} apart. We ascribe these differences to interference terms arising from coherent excitation of the {ital J}=1 and overlapping 5{ital pnp} {ital J}=0,2 autoionizing levels. A calculation of these effects is presented that agrees quite well with the experimental data. We obtain experimental excitation amplitude ratios and assign a previously undetected autoionizing level to 5{ital p}6{ital p} {sup 3}{ital D}{sub 2}.

• OSTI ID: 6045771
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:5; ISSN PLRAA; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
AUTOIONIZATION
CADMIUM
COLLISIONS
ELECTRON COLLISIONS
ELECTRON SPECTRA
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 100-1000
EXCITATION
IONIZATION
METALS
SPECTRA