# Energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28

## Abstract

We report calculations of energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28. The General-Purpose Relativistic Atomic Structure Package is adopted for calculating energy levels and radiative rates, while for determining the collision strengths and subsequently the excitation rates, the Dirac Atomic R-matrix Code is used. Oscillator strengths, radiative rates, and line strengths are listed for all E1, E2, M1, and M2 transitions among the lowest 24 levels of the Li-like ions considered. Collision strengths have been averaged over a Maxwellian velocity distribution, and the effective collision strengths obtained are given over a wide temperature range up to 10{sup 7.8} K. Additionally, lifetimes are listed for all calculated levels of these ions. Finally, extensive comparisons are made with results available in the literature, as well as with our analogous calculations for all parameters with the Flexible Atomic Code, in order to assess the accuracy of the results.

- Authors:

- Publication Date:

- OSTI Identifier:
- 22237239

- Resource Type:
- Journal Article

- Journal Name:
- Atomic Data and Nuclear Data Tables

- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 6; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0092-640X

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; ACCURACY; COMPARATIVE EVALUATIONS; DISTRIBUTION; ELECTRONS; ENERGY LEVELS; EXCITATION; ION COLLISIONS; IONS; LIFETIME; M2-TRANSITIONS; OSCILLATOR STRENGTHS; R MATRIX; RELATIVISTIC RANGE; TEMPERATURE RANGE OVER 4000 K

### Citation Formats

```
Aggarwal, Kanti M., E-mail: K.Aggarwal@qub.ac.uk, and Keenan, Francis P.
```*Energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28*. United States: N. p., 2012.
Web. doi:10.1016/J.ADT.2011.05.002.

```
Aggarwal, Kanti M., E-mail: K.Aggarwal@qub.ac.uk, & Keenan, Francis P.
```*Energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28*. United States. doi:10.1016/J.ADT.2011.05.002.

```
Aggarwal, Kanti M., E-mail: K.Aggarwal@qub.ac.uk, and Keenan, Francis P. Thu .
"Energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28". United States. doi:10.1016/J.ADT.2011.05.002.
```

```
@article{osti_22237239,
```

title = {Energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28},

author = {Aggarwal, Kanti M., E-mail: K.Aggarwal@qub.ac.uk and Keenan, Francis P.},

abstractNote = {We report calculations of energy levels, radiative rates, and electron impact excitation rates for transitions in Li-like ions with 21≤Z≤28. The General-Purpose Relativistic Atomic Structure Package is adopted for calculating energy levels and radiative rates, while for determining the collision strengths and subsequently the excitation rates, the Dirac Atomic R-matrix Code is used. Oscillator strengths, radiative rates, and line strengths are listed for all E1, E2, M1, and M2 transitions among the lowest 24 levels of the Li-like ions considered. Collision strengths have been averaged over a Maxwellian velocity distribution, and the effective collision strengths obtained are given over a wide temperature range up to 10{sup 7.8} K. Additionally, lifetimes are listed for all calculated levels of these ions. Finally, extensive comparisons are made with results available in the literature, as well as with our analogous calculations for all parameters with the Flexible Atomic Code, in order to assess the accuracy of the results.},

doi = {10.1016/J.ADT.2011.05.002},

journal = {Atomic Data and Nuclear Data Tables},

issn = {0092-640X},

number = 6,

volume = 98,

place = {United States},

year = {2012},

month = {11}

}