Atomic data and spectral line intensities for Mg VI
Abstract
Electron impact collision strengths, energy levels, oscillator strengths, and spontaneous radiative decay rates are calculated for Mg VI. The configurations used are 2s ^{2}2p ^{3}, 2s2p ^{4}, 2p ^{5}, 2s ^{2}2p ^{2}3s, 2s ^{2}2p ^{2}3p, and 2s ^{2}2p ^{2}3d, giving rise to 72 finestructure levels in intermediate coupling. Collision strengths are calculated at five incident energies, 12, 24, 36, 48, and 60 Ry. Excitation rate coefficients are calculated as a function of electron temperature by assuming a Maxwellian electron velocity distribution. Using the excitation rate coefficients and the radiative transition rates, statistical equilibrium equations for level populations are solved at electron densities covering the range of 10 ^{8}10 ^{14} cm ^{3} at an electron temperature of log T_{e} (K) = 5.6, corresponding to maximum abundance of Mg VI. Relative and absolute spectral line intensities are calculated and compared with observations of a solar active region.
 Publication:

Atomic Data and Nuclear Data Tables
 Pub Date:
 January 2007
 DOI:
 10.1016/j.adt.2006.06.001
 Bibcode:
 2007ADNDT..93....1L