Generalized oscillator strengths for the valence-shell excitations of argon

Journal Article · Sat Apr 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787102

Linfan, Zhu; Huadong, Cheng; Zhensheng, Yuan; Xiaojing, Liu; Jianmin, Sun; Kezun, Xu ^[1]

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1. Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026 (China)

The generalized oscillator strengths for the valence-shell excitations to 3p{sup 5}(4s,4s{sup '}) and 3p{sup 5}(4p,4p{sup '}) of argon were measured by an angle-resolved fast-electron energy-loss spectrometer at an incident electron energy of 2500 eV. The transition multipolarities for these excitations were elucidated with the help of the calculated intermediate coupling coefficients using the COWAN code. The generalized oscillator strength profiles for the electric dipole excitations to 3p{sup 5}(4s,4s{sup '}), the electric quadrupole and monopole excitations to 3p{sup 5}(4p,4p{sup '}) were analyzed and their positions of the extrema were determined. Furthermore, the generalized oscillator strength of the electric quadrupole excitation in 3p{yields}4p was determined and its profile is in general agreement with the theoretical calculations. However, the generalized oscillator strength profile of the electric monopole excitation in 3p{yields}4p is different from the theoretical calculations.

• OSTI ID: 20787102
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
E0-TRANSITIONS
E2-TRANSITIONS
ELECTRIC DIPOLES
ELECTRON SPECTRA
ELECTRON-ATOM COLLISIONS
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
EV RANGE
EXCITATION
EXCITED STATES
INTERMEDIATE COUPLING
MULTIPOLARITY
OSCILLATOR STRENGTHS
P STATES
VALENCE