Experimental Branching Fractions, Transition Probabilities, and Oscillator Strengths of La ii
Branching fractions of 86 La ii lines in the spectral range of 243.340–626.229 nm have been measured using a grating spectrometer based on the emission spectra of a lanthanum hollow cathode lamp. Combining these branching fractions with previously measured radiative lifetimes using the time-resolved...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Supplement Series |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4365/adc927 |
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| Summary: | Branching fractions of 86 La ii lines in the spectral range of 243.340–626.229 nm have been measured using a grating spectrometer based on the emission spectra of a lanthanum hollow cathode lamp. Combining these branching fractions with previously measured radiative lifetimes using the time-resolved laser-induced fluorescence technique, transition probabilities and oscillator strengths were determined for 86 lines belonging to transitions 5 d ^2 –4 f 5 d , 5 d 6 s –4 f 5 d , 4 f 6 s –5 d 7s, 4 f 5 d –5 d 7s, 5 d 6 p –5 d 7s, 4 f 6 s –5 d 6 d , 4 f 5 d –5 d 6 d , 5 d 6 p –5 d 6 d , 6 s 6 p –5 d 6 d , 4 f 5 d –4 f ^2 , and 5 d 6 p –4 f ^2 . These fundamental atomic parameters are important for deriving chemical abundances from astronomical spectra by the method of equivalent widths or synthetic spectra. |
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| ISSN: | 0067-0049 |