Jc. Pickering et al., The FERRUM project: Branching ratios and atomic transition probabilities of FeII transitions from the 3d(6)(a(3)F)4p subconfiguration in the visible to VUV spectral region, ASTRON ASTR, 377(1), 2001, pp. 361-367
We report measurements of the relative intensities of 81 emission lines of
Fe II between 160 nm and 350 nm (62 168 cm(-1) to 28 564 cm(-1)) from 4 lev
els by high resolution Fourier transform spectrometry, using a Penning disc
harge lamp as light source. These relative intensities have been used to de
termine the line branching fractions, which have then been combined with ac
curate experimental radiative lifetime measurements reported recently to gi
ve absolute transition probabilities and oscillator strengths for 81 lines.
The accuracy of these f-values is compared with other previous experimenta
l measurements, and with theoretical values. The new transition probabiliti
es will allow accurate determinations of Fe II abundances in a wide variety
of astrophysical objects.