N R Badnell et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 1337 doi:10.1088/0953-4075/36/7/305
N R Badnell1, D C Griffin2 and D M Mitnik2,3
Show affiliationsWe have carried out several R-matrix with pseudo-states (RMPS) calculations for the electron-impact excitation of B+. Maxwell-averaged effective collision strengths have been determined for excitations between the lowest 20 terms, including all those arising from the 2s3l and 2s4l configurations. A comparison of results from 114 term and 134 term close-coupling (CC) RMPS calculations demonstrates the convergence in the pseudo-state expansion representing the continuum and high bound-states. Comparison of the 114CC RMPS results with those from a 20CC R-matrix calculation, using the same 114 term configuration interaction target, shows a reduction in the effective collision strengths by up to a factor of two at higher temperatures for transitions to n = 4. The modelling of spectral emission from boron, and from n = 4 terms in B+ in particular, is important for studying impurity influx in both current (TEXTOR) and future (ITER) magnetic fusion reactors.
34.80.Dp Atomic excitation and ionization
32.50.+d Fluorescence, phosphorescence (including quenching)
Issue 7 (14 April 2003)
Received 25 November 2002, in final form 27 January 2003
Published 14 March 2003
N R Badnell et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 1337
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