Oscillator strength measurements in Pr II with the fast-ion-beam laser-induced-fluorescence technique
Abstract
The spontaneous-emission branching fractions of 32 levels of Pr II were measured by the fast-ion-beam laser-induced-fluorescence technique. The levels studied had energies from ~21 500 to ~29 000 cm-1, and the decay branches detected were in the range from 250 to 850 nm. The experimental uncertainties are within 10%. Using our previously measured radiative lifetimes, we determined the Einstein A coefficients and oscillator strengths for 260 transitions. The results are important for stellar elemental abundance determinations.
- Publication:
-
Physica Scripta
- Pub Date:
- November 2007
- DOI:
- Bibcode:
- 2007PhyS...76..577L