Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii
We report new branching fraction measurements for 224 ultraviolet and optical transitions of Tm ii . These transitions range in wavelength (wavenumber) from 2350 to 6417 Å (42,532–15,579 cm ^−1 ) and originate in 13 odd-parity and 24 even-parity upper levels. Thirty-five of the 37 levels, accounting...
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/ad614f |
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| author | E. A. Den Hartog G. T. Voith I. U. Roederer |
| author_facet | E. A. Den Hartog G. T. Voith I. U. Roederer |
| author_sort | E. A. Den Hartog |
| collection | DOAJ |
| description | We report new branching fraction measurements for 224 ultraviolet and optical transitions of Tm ii . These transitions range in wavelength (wavenumber) from 2350 to 6417 Å (42,532–15,579 cm ^−1 ) and originate in 13 odd-parity and 24 even-parity upper levels. Thirty-five of the 37 levels, accounting for 213 of the 224 transitions, are studied for the first time. Branching fractions are determined for two levels studied previously for comparison to earlier results. The levels studied for the first time are high lying, ranging in energy from 35,753 to 54,989 cm ^−1 . The branching fractions are determined from emission spectra from two different high-resolution spectrometers. These are combined with radiative lifetimes reported in an earlier study to produce a set of transition probabilities and log( gf ) values with accuracy ranging from 5% to 30%. Comparison is made to experimental and theoretical transition probabilities from the literature where such data exist. These new log( gf ) values are used to derive an abundance from one previously unused Tm ii line in the UV spectrum of the r -process-enhanced metal-poor star HD 222925, and this abundance is consistent with previous determinations based on other Tm ii lines. |
| format | Article |
| id | doaj-art-bb4fb23d5e314ae0bb3b6864abec6ddc |
| institution | Kabale University |
| issn | 0067-0049 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal Supplement Series |
| spelling | doaj-art-bb4fb23d5e314ae0bb3b6864abec6ddc2025-08-20T03:27:24ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492024-01-012741910.3847/1538-4365/ad614fAtomic Transition Probabilities for Ultraviolet and Optical Lines of Tm iiE. A. Den Hartog0https://orcid.org/0000-0001-8582-0910G. T. Voith1https://orcid.org/0009-0008-8263-968XI. U. Roederer2https://orcid.org/0000-0001-5107-8930Department of Physics, University of Wisconsin–Madison , 1150 University Ave., Madison, WI 53706, USA ; eadenhar@wisc.edu, gtvoith@wisc.eduDepartment of Physics, University of Wisconsin–Madison , 1150 University Ave., Madison, WI 53706, USA ; eadenhar@wisc.edu, gtvoith@wisc.eduDepartment of Physics, North Carolina State University , Raleigh, NC 27695, USA ; iuroederer@ncsu.eduWe report new branching fraction measurements for 224 ultraviolet and optical transitions of Tm ii . These transitions range in wavelength (wavenumber) from 2350 to 6417 Å (42,532–15,579 cm ^−1 ) and originate in 13 odd-parity and 24 even-parity upper levels. Thirty-five of the 37 levels, accounting for 213 of the 224 transitions, are studied for the first time. Branching fractions are determined for two levels studied previously for comparison to earlier results. The levels studied for the first time are high lying, ranging in energy from 35,753 to 54,989 cm ^−1 . The branching fractions are determined from emission spectra from two different high-resolution spectrometers. These are combined with radiative lifetimes reported in an earlier study to produce a set of transition probabilities and log( gf ) values with accuracy ranging from 5% to 30%. Comparison is made to experimental and theoretical transition probabilities from the literature where such data exist. These new log( gf ) values are used to derive an abundance from one previously unused Tm ii line in the UV spectrum of the r -process-enhanced metal-poor star HD 222925, and this abundance is consistent with previous determinations based on other Tm ii lines.https://doi.org/10.3847/1538-4365/ad614fTransition probabilitiesAtomic spectroscopyStellar abundances |
| spellingShingle | E. A. Den Hartog G. T. Voith I. U. Roederer Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii The Astrophysical Journal Supplement Series Transition probabilities Atomic spectroscopy Stellar abundances |
| title | Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii |
| title_full | Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii |
| title_fullStr | Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii |
| title_full_unstemmed | Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii |
| title_short | Atomic Transition Probabilities for Ultraviolet and Optical Lines of Tm ii |
| title_sort | atomic transition probabilities for ultraviolet and optical lines of tm ii |
| topic | Transition probabilities Atomic spectroscopy Stellar abundances |
| url | https://doi.org/10.3847/1538-4365/ad614f |
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