# Generalized oscillator strengths for some higher valence-shell excitations of argon

## Abstract

The valence shell excitations of argon were investigated by an angle-resolved fast-electron energy-loss spectrometer at an incident electron energy of 2500 eV, and the transition multipolarities for the excitations of 3p{yields}3d, 4d, 5s, and 5p were elucidated with the help of the calculated intermediate coupling coefficients using the COWAN code. The generalized oscillator strengths for the excitations to 3p{sup 5}(3d,3d{sup '}), 3p{sup 5}(5p,5p{sup '}), and 3p{sup 5}(5s,4d) were measured, and the profiles of these generalized oscillator strength were analyzed. Furthermore, although the present experimental positions of the maxima for the electric-monopole and electric-quadrupole excitations in 3p{yields}5p are in agreement with the theoretical calculations [Amusia et al., Phys. Rev. A 67, 022703 (2003)], the generalized oscillator strength profiles show obvious differences. In addition, the experimental generalized oscillator strength ratios for the electric-octupole transitions in 3p{yields}3d are different from the theoretical prediction calculated by the COWAN code.

- Authors:

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

- Publication Date:

- OSTI Identifier:
- 20982321

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.75.032701; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; ARGON; ELECTRIC CHARGES; ELECTRON-ATOM COLLISIONS; ELECTRONIC STRUCTURE; ELECTRONS; ENERGY LOSSES; ENERGY-LOSS SPECTROSCOPY; EXCITATION; FORECASTING; INTERMEDIATE COUPLING; KEV RANGE 01-10; OSCILLATOR STRENGTHS; QUADRUPOLES; SPECTROMETERS; VALENCE

### Citation Formats

```
Zhu, Lin-Fan, Yuan, Hui, Jiang, Wei-Chun, Zhang, Fang-Xin, Yuan, Zhen-Sheng, Cheng, Hua-Dong, and Xu, Ke-Zun.
```*Generalized oscillator strengths for some higher valence-shell excitations of argon*. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVA.75.032701.

```
Zhu, Lin-Fan, Yuan, Hui, Jiang, Wei-Chun, Zhang, Fang-Xin, Yuan, Zhen-Sheng, Cheng, Hua-Dong, & Xu, Ke-Zun.
```*Generalized oscillator strengths for some higher valence-shell excitations of argon*. United States. doi:10.1103/PHYSREVA.75.032701.

```
Zhu, Lin-Fan, Yuan, Hui, Jiang, Wei-Chun, Zhang, Fang-Xin, Yuan, Zhen-Sheng, Cheng, Hua-Dong, and Xu, Ke-Zun. Thu .
"Generalized oscillator strengths for some higher valence-shell excitations of argon". United States.
doi:10.1103/PHYSREVA.75.032701.
```

```
@article{osti_20982321,
```

title = {Generalized oscillator strengths for some higher valence-shell excitations of argon},

author = {Zhu, Lin-Fan and Yuan, Hui and Jiang, Wei-Chun and Zhang, Fang-Xin and Yuan, Zhen-Sheng and Cheng, Hua-Dong and Xu, Ke-Zun},

abstractNote = {The valence shell excitations of argon were investigated by an angle-resolved fast-electron energy-loss spectrometer at an incident electron energy of 2500 eV, and the transition multipolarities for the excitations of 3p{yields}3d, 4d, 5s, and 5p were elucidated with the help of the calculated intermediate coupling coefficients using the COWAN code. The generalized oscillator strengths for the excitations to 3p{sup 5}(3d,3d{sup '}), 3p{sup 5}(5p,5p{sup '}), and 3p{sup 5}(5s,4d) were measured, and the profiles of these generalized oscillator strength were analyzed. Furthermore, although the present experimental positions of the maxima for the electric-monopole and electric-quadrupole excitations in 3p{yields}5p are in agreement with the theoretical calculations [Amusia et al., Phys. Rev. A 67, 022703 (2003)], the generalized oscillator strength profiles show obvious differences. In addition, the experimental generalized oscillator strength ratios for the electric-octupole transitions in 3p{yields}3d are different from the theoretical prediction calculated by the COWAN code.},

doi = {10.1103/PHYSREVA.75.032701},

journal = {Physical Review. A},

number = 3,

volume = 75,

place = {United States},

year = {Thu Mar 15 00:00:00 EDT 2007},

month = {Thu Mar 15 00:00:00 EDT 2007}

}