Fluorine mean-life measurements below 1000 Å using the beam–foil technique
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We have used the beam–foil technique to measure mean lives for 16 transitions in F I–F IV in the wavelength region 400 Å–1000 Å. Good agreement is found with the results of recent calculations, particularly those employing correlated wave functions. The f-value trends for 5 isoelectronic sequences are presented in detail (2p5 2P0–2p43s2 D and 2p5 2P0–2p43s 2P in F I; 2p4 3P–2p33s 3D0 in F II; 2p3 2D0–2s2p4 2D and 2p3 4S0–2s2p4 4P in F III). Our f value for the 955 Å multiplet in F I is also used in conjunction with some new satellite data to show that the fluorine abundance is apparently depleted in interstellar clouds by a factor of at least 3 below its solar value.
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2009 ◽
Vol 9
(11)
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pp. 3641-3662
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2004 ◽
Vol 19
(31)
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pp. 5435-5442
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2007 ◽
Vol 2007
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pp. 1-4
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2017 ◽
Vol 26
(05)
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pp. 1750032
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