SIMBAD references

Radiative lifetimes for six highly excited levels in Fe II have been measured at Lund Laser Centre applying the laser induced fluorescence technique and two-step excitation. The energy levels belong to the even-parity 3d⁶(⁵D)4d subconfiguration at about 10eV. Branching fractions (BF:s) of 29 transitions from these levels to the 3d⁶(⁵D)4p subconfiguration at about 5eV have been measured in the wavelength region 2000-3000Å with the Lund Fourier Transform Spectrometer. By normalizing the BF:s with the lifetimes we get experimental oscillator strengths for these 29 4p-4d lines. The oscillator strengths are compared with new theoretical calculations using the orthogonal operator technique and applied to high-resolution spectra of the star χ Lupi, recorded with the Hubble Space Telescope.