Threshold photoelectron source for the study of low-energy electron scattering: Total cross section for electron scattering from krypton in the energy range from 14 meV to 20 eV

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.062707· OSTI ID:21528888

Kurokawa, M; Kitajima, M; Toyoshima, K; Odagiri, T ^[1]; Kato, H; Kawahara, H; Hoshino, M; Tanaka, H ^[2]; Ito, K ^[3]

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1. Department of Chemistry, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)
2. Department of Physics, Sophia University, Tokyo 102-8554 (Japan)
3. Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801 (Japan)

An experimental technique for the measurement of the total cross section for electron scattering from atoms and molecules at high resolution is described. The total cross sections for electron scattering from Kr in the energy range from 14 meV to 20 eV obtained with the technique are also reported. The present technique employs a combination of the penetrating field technique and the threshold photoionization of rare-gas atoms using synchrotron radiation as an electron source in order to produce a high-resolution electron beam at very low energy. The characteristics of the electron sources were determined by measuring the ionizing photon energy dependence of photoelectron yield. Absolute total cross sections for electron scattering are obtained by the attenuation method. The measured absolute values of the total cross sections for electron scattering from Kr agree with those obtained by other groups down to 175 meV, above which several experimental works have been reported. Below 175 meV, the present results generally agree with theoretical cross sections down to 14 meV. The resonant structures in the total cross sections due to Kr{sup -} (4p{sup 5}5s{sup 2} {sup 2}P{sub 3/2}) and the Kr{sup -} (4p{sup 5}5s{sup 2} {sup 2}P{sub 1/2}) Feshbach resonances are also reported. The resolution of the present setup has been estimated from a fit of the measured profile of the Kr{sup -} (4p{sup 5}5s{sup 2} {sup 2}P{sub 3/2}) resonance by the theoretical curve obtained from the resonant scattering theory.

• OSTI ID: 21528888
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BEAMS
BOSONS
BREMSSTRAHLUNG
COLLISIONS
CROSS SECTIONS
DIAGRAMS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON SOURCES
ELECTRON-ATOM COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EV RANGE
FERMIONS
FLUIDS
GASES
INELASTIC SCATTERING
INFORMATION
IONIZATION
KRYPTON
LEPTON BEAMS
LEPTONS
MASSLESS PARTICLES
MEV RANGE
MOLECULE COLLISIONS
NONMETALS
PARTICLE BEAMS
PARTICLE SOURCES
PHOTOIONIZATION
PHOTONS
RADIATION SOURCES
RADIATIONS
RARE GASES
RESOLUTION
RESONANCE
RESONANCE SCATTERING
SCATTERING
SYNCHROTRON RADIATION
TOTAL CROSS SECTIONS