Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance
Ti-ii transition probabilities and radiative lifetimes in TI and the solar titanium abundance
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Ti-ii 跃迁概率和 TI 中的辐射寿命以及太阳能钛丰度
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Lawler
中科院分区：
文献类型：
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作者：
A. Bizzarri;M. Huber;A. Noels;N. Grevesse;S. Bergeson;P. Tsekeris;J. Lawler
源自 7 个不同原子能级的 100 条 Ti-II 发射线的跃迁概率已通过将支化分数与辐射寿命相结合来确定。使用傅里叶变换光谱法在空心阴极上测量支化分数。这 7 级和 35 级附加级的辐射寿命是使用慢钛离子束上的时间分辨激光诱导荧光测量的。 21条非常弱的谱线的跃迁概率已被用来推导太阳钛丰度 Ti = log(N Ti /N H ) + 12 = 5.04 ± 0.04 dex，这对太阳模型不敏感。该值与陨石钛丰度不一致（4.93±0.02）
Transition probabilities of 100 Ti-II emission lines, originating from 7 different atomic levels, have been determined by combining branching fractions with radiative lifetimes. The branching fractions were measured using Fourier transform spectroscopy on a hollow cathode. The radiative lifetimes of these 7―and 35 additional―levels were measured using time resolved laser-induced fluorescence on a slow Ti ion beam. The transition probabilities of 21 very weak lines have been used to derive a solar titanium abundance of a Ti = log(N Ti /N H ) + 12 = 5.04 ± 0.04 dex, which is insensitive to the solar model. This value is in disagreement with the meteoritic titanium abundance (4.93 ± 0.02)