Absolute generalized oscillator strengths of 2{sup 1}{ital S} and 2{sup 1}{ital P} excitations of helium measured by angle-resolved electron-energy-loss spectroscopy

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.3081· OSTI ID:283840

Xu, K Z; Feng, R F; Wu, S L; Ji, Q; Zhang, X J; Zhong, Z P ^[1]; Zheng, Y ^[2]

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1. Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230027 (China)
2. Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T1Z1 (CANADA)

The differential scattering cross sections and the generalized oscillator strengths of the 1{sup 1}{ital S}{r_arrow}2{sup 1}{ital S} and 1{sup 1}{ital S}{r_arrow}2{sup 1}{ital P} transitions of helium have been measured by angle-resolved electron-energy-loss spectroscopy with an incident electron energy of 1500 eV and within the range 2{degree}{endash}11.5{degree} of scattering angles. The corrections for angular factors and density effects have also been made for the experimental results. The differential cross sections and generalized oscillator strength values are absolute and are the first to be measured at such a high impact energy. The experimental results are compared with other measurements and theoretical calculations in the literature. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 283840
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
BORN APPROXIMATION
ENERGY-LOSS SPECTROSCOPY
EXCITED STATES
HELIUM
KEV RANGE 01-10
OSCILLATOR STRENGTHS
P STATES
S STATES