Energy levels, radiative rates and electron impact excitation rates for transitions in Hlike N VII, O VIII, F IX, Ne X and Na XI
Abstract
We report calculations of energy levels, radiative rates and electron impact excitation rates for transitions in Hlike N VII, O VIII, F IX, Ne X and Na XI. The generalpurpose relativistic atomic structure package (grasp) is adopted for calculating energy levels and radiative rates, while the Dirac atomic Rmatrix code (darc) and the flexible atomic code (fac) are used for determining the collision strengths and subsequently the excitation rates. Oscillator strengths, radiative rates and line strengths are listed for all E1, E2, M1 and M2 transitions among the lowest 25 levels of the above five ions. Collision strengths have been averaged over a Maxwellian velocity distribution, and the effective collision strengths so obtained are reported over a wide temperature range below 10^{7} K. Additionally, lifetimes are also given for all the calculated energy levels of the above five ions.
 Publication:

Physica Scripta
 Pub Date:
 July 2010
 DOI:
 10.1088/00318949/82/01/015006
 Bibcode:
 2010PhyS...82a5006A