The FERRUM project: Branching ratios and atomic transition probabilities of Fe II transitions from the 3d6(a 3F)4p subconfiguration in the visible to VUV spectral region
Abstract
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 levels by high resolution Fourier transform spectrometry, using a Penning discharge lamp as light source. These relative intensities have been used to determine the line branching fractions, which have then been combined with accurate experimental radiative lifetime measurements reported recently to give absolute transition probabilities and oscillator strengths for 81 lines. The accuracy of these f-values is compared with other previous experimental measurements, and with theoretical values. The new transition probabilities will allow accurate determinations of Fe II abundances in a wide variety of astrophysical objects. Tables 2 and 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/361
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 2001
- DOI:
- 10.1051/0004-6361:20010943
- Bibcode:
- 2001A&A...377..361P
- Keywords:
-
- ATOMIC DATA;
- LINE: IDENTIFICATION;
- TECHNIQUES: SPECTROSCOPIC;
- STARS: ABUNDANCES