标题： 铥离子第二谱线的紫外和光学波段的原子跃迁概率 显示英文标题

标题： Atomic Transition Probabilities for UV and Optical Lines of Tm II

摘要： 我们报告了224个铥离子（Tm II）的紫外（UV）和光学跃迁的新分支比测量结果。这些跃迁的波长（波数）范围为2350 - 6417埃（42532 - 15579 cm-1），起源于13个奇宇称和24个偶宇称的上能级。37个能级中的35个，占224个跃迁中的213个，首次被研究。对两个之前研究过的能级测定了分支比，以与早期结果进行比较。首次研究的能级是高能级，能量范围为35753 - 54989 cm-1。分支比是从两种不同高分辨率光谱仪的发射光谱中确定的。这些数据结合先前研究中报道的辐射寿命，生成了一组精度在5 - 30%之间的跃迁概率和log(gf)值。在存在此类数据的情况下，将这些结果与文献中的实验和理论跃迁概率进行了比较。这些新的log(gf)值用于从以前未使用的铥离子（Tm II）紫外谱线中推导出丰度，在增强r过程的贫金属星HD 222925的紫外光谱中，该丰度与基于其他Tm II谱线的先前测定结果一致。 显示英文摘要

摘要： We report new branching fraction measurements for 224 ultraviolet (UV) and optical transitions of Tm II. These transitions range in wavelength (wavenumber) from 2350 - 6417 Angstroms (42532 - 15579 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 35753 - 54989 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 - 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.