The spectrum of osmium was observed in the (225–2100) Å wavelength region. The (5d⁶ $+$ 5d⁵6s)$-$ (5d⁵6p $+$ 5d⁴6s6p) transition array of two times ionized osmium, Os III, has been investigated and 1039 spectral lines have been classified in the region. The analysis has led to the determination of the 5d⁶, 5d⁵6s, 5d⁵6p and 5d⁴6s6p configurations. Fifty-eight levels of the 5d⁶ and 5d⁵6s configurations in the even system and 142 levels of the 5d⁵6p and 5d⁴6s6p configurations in the odd system have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.

在（225–2100）Å波长区域观察到了spectrum的光谱。（5d ⁶ $+$5d ⁵ 6s）$-$ （5d ⁵ 6p$+$已经研究了两次电离Os III的5d ⁴ 6s6p）过渡阵列，并对该区域分类了1039条谱线。该分析导致了5d的测定⁶，5D ⁵ 6S，5D ⁵ 6P和5d ⁴ 6s6p配置。在偶数系统中有58个级别的5d ⁶和5d ⁵ 6s配置，以及142个级别的5d ⁵ 6p和5d ⁴在奇数系统中已建立6s6p配置。正交算子技术用于计算级别结构和转移概率。能量参数已通过最小二乘方确定为所观察到的水平。给出了计算的跃迁概率和能量值，以及从拟合参数中获得的LS组成。