Atomic data from the IRON Project. XXIX. Radiative rates for transitions within the N = 2 complex in ions of the boron isoelectronic sequence
Abstract
As part of the IRON Project, radiative rates have been calculated for the E1, E2 and M1 transitions within the n=2 complex in ions of the boron isoelectronic sequence (6<= Z<= 28). The computations have been carried out with the atomic structure code superstructure which facilitates the generation of extended radiative datasets including configuration interaction, BreitPauli relativistic contributions and semiempirical termenergy corrections. By means of extensive comparisons with the available datasets for this sequence, with detailed singleion calculations and recent experiments, we have been able to assign accuracy ratings to the present Avalues. We find that in general the spinallowed and spinforbidden E1 transitions are accurate to 10% and 20%, respectively, except for a few transitions in ions with Z<= 7 that are perturbed by admixture with lowlying n=3 states (e.g. 2ssp23l ) and for those affected by the avoided crossing of the 2s2psp2 \ sp2 S_{1/2} and sp2 P_{1/2} which takes place at Z ~ 22. It is concluded that, statistically, the present dataset is the most accurate to date for this astrophysically relevant sequence. A detailed table of the present transition probabilities is available in electronic form from the CDS via anonymous ftp 130.79.128.5
 Publication:

Astronomy and Astrophysics Supplement Series
 Pub Date:
 September 1998
 DOI:
 10.1051/aas:1998435
 Bibcode:
 1998A&AS..131..499G
 Keywords:

 ATOMIC DATA;
 ATOMIC PROCESSES