INVESTIGADORES
MITNIK Dario Marcelo
artículos
Título:
Electron-impact excitation of Fe21+, including n = 4 levels
Autor/es:
BADNELL, N. R.; GRIFFIN, D. C.; MITNIK, D. M.
Revista:
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Editorial:
IOP
Referencias:
Lugar: Bristol, London; Año: 2001 vol. 34 p. 5071 - 5085
ISSN:
0953-4075
Resumen:
We have carried out a 204-level close-coupling (CC) calculation for
B-like Fe using the R-matrix method in conjunction with the
intermediate-coupling frame transformation method as part of the RmaX
Network programme of work to provide atomic data for x-ray processes. We
have also carried out two 125-level CC calculations to enable us to
illustrate the effect of n = 4 levels on collision data involving n = 2
and 3 levels and to provide a quantitative guide to the uncertainty
resulting from the partial resolution of resonances. From our 204-level
CC calculation, we have generated effective collision strengths over T =
105-108 K for all 20 706 inelastic transitions,
which is an order of magnitude larger than has been generated hitherto.
We provide illustrative comparisons with the results of previous
workers, where possible, and find a broad accord. The consistent and
comprehensive set of data that we have generated (energy levels,
radiative rates and effective collision strengths, including Born
limits) is of great relevance to studies utilizing spectral observations
from the new high-resolution x-ray satellites Chandra and XMM-Newton, as
well as being necessary for the collisional-radiative modelling of
metallic impurities that will arise in the next generation of magnetic
fusion reactors.