Zobrazeno 1 - 10
of 75
pro vyhledávání: '"E. A. Den Hartog"'
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 1, p 9 (2024)
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
Externí odkaz:
https://doaj.org/article/bb4fb23d5e314ae0bb3b6864abec6ddc
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 265, Iss 2, p 42 (2023)
We report new measurements of branching fractions for 20 UV and blue lines in the spectrum of neutral silicon (Si i ) originating in the 3 s ^2 3 p 4 s ^3 P ^o _1,2 , ^1 P ^o _1 , and 3 s 3 p ^3 ^1 D ^o _1,2 upper levels. Transitions studied include
Externí odkaz:
https://doaj.org/article/73d50687ada447a99f4039dde8272792
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 289:108283
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bc35318f55fb7b16c2261bf859062a6
https://doi.org/10.1016/j.jqsrt.2022.108283
https://doi.org/10.1016/j.jqsrt.2022.108283
We report new branching fraction measurements for 199 UV and optical transitions of Hf II. These transitions range in wavelength (wavenumber) from 2068- 6584 A (48322-15183 cm-1) and originate in 17 odd-parity upper levels ranging in energy from 3857
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9837afec5ab7db1c7f4a28e3b1a4fcac
http://arxiv.org/abs/2102.11308
http://arxiv.org/abs/2102.11308
Publikováno v:
The Astrophysical Journal Supplement Series. 258:27
Improved energy levels for singly ionized and neutral hafnium of both even and odd parity are determined from Fourier transform spectrometer data using a least-squares optimization procedure. Data from interferometric spectrometers provide much tight
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cd37507fa8bbb9d3975df2989460b71
https://doi.org/10.3847/1538-4365/ac36d7
https://doi.org/10.3847/1538-4365/ac36d7
Autor:
E. A. Den Hartog, James E. Lawler
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 207:41-47
The Ar i and ii branching ratio calibration method is discussed with the goal of improving the technique. This method of establishing a relative radiometric calibration is important in ongoing research to improve atomic transition probabilities for q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::993be0a803bf390c16ca2e9b40a40285
https://doi.org/10.1016/j.jqsrt.2017.12.010
https://doi.org/10.1016/j.jqsrt.2017.12.010
Publikováno v:
Canadian Journal of Physics. 95:783-789
The synthesis of iron (Fe-) group elements was different in the early Galaxy than it is today. Measurements of the relative Fe-group elemental abundances in old metal-poor stars yield information on the Galactic chemical evolution and some informatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be94f950911e8b4d0129a0e78bb94852
https://doi.org/10.1139/cjp-2016-0689
https://doi.org/10.1139/cjp-2016-0689
We report new branching fractions for 121 UV lines from the low-lying odd-parity levels of Fe II belonging to the z6Do, z6Fo, z6Po, z4Fo, z4Do and z4Po terms of the 3d6(5D)4p configuration. These lines range in wavelength from 2250 - 3280 {\AA} and o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a287611804f654a6e84f36ae65b44695
Publikováno v:
The Astrophysical Journal Supplement Series. 248:10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2892cbe5c15859fb37b64df66eb73069
https://doi.org/10.3847/1538-4365/ab84f5
https://doi.org/10.3847/1538-4365/ab84f5
Autor:
Ulrike Heiter, Juliet C. Pickering, M. P. Ruffoni, James E. Lawler, E. A. Den Hartog, A. Guzman, M. T. Belmonte
We report new experimental Fe I oscillator strengths obtained by combining measurements of branching fractions measured with a Fourier Transform spectrometer and time-resolved, laser-induced fluorescence lifetimes. This study covers the spectral regi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ac233eb4a17cde2f38e7c7bf25bdabd
http://arxiv.org/abs/1710.07571
http://arxiv.org/abs/1710.07571