| Issue |
A&A
Volume 489, Number 3, October III 2008
|
|
|---|---|---|
| Page(s) | 1377 - 1388 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361:200810531 | |
| Published online | 18 August 2008 | |
Energy levels, radiative rates, and electron impact excitation rates for transitions in O VII*
Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, UK e-mail: K.Aggarwal@qub.ac.uk
Received:
7
July
2008
Accepted:
7
August
2008
Aims. In this paper we report calculations for energy levels, radiative rates, and electron impact excitation rates for transitions in O vii.
Methods. The grasp (general-purpose relativistic atomic structure package) is adopted for calculating energy levels and radiative rates. For determining the collision strengths and subsequently the excitation rates, the Dirac atomic R-matrix code (darc) and the flexible atomic code (fac) are used.
Results. Oscillator strengths, radiative rates, and line strengths are reported for all E1, E2, M1, and M2 transitions among the lowest 49 levels of O vii.
Collision strengths have been averaged over a Maxwellian velocity distribution, and the resulting effective collision strengths are reported over a wide temperature
range below 2
106 K. Additionally, lifetimes are also listed for all levels.
Key words: atomic data / atomic processes
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.