论文标题
高精度确定氧气K $α$过渡能量不包括星际氧气的不一致运动
High-Precision Determination of Oxygen-K$α$ Transition Energy Excludes Incongruent Motion of Interstellar Oxygen
论文作者
论文摘要
我们展示了一种广泛适用的技术，可以通过实验性众所周知且准确地可计算的高电荷离子的X射线光谱能量量表，从而使我们能够测量具有8 meV不确定的分子O $ _2 $的K-Shell Rydberg光谱。我们揭示了系统的$ \ sim $ 450 MEV从以前的文献值转移，并解决了中性原子氧的天体物理和实验室测量之间的特殊差异，后者对上述O $ _2 $ _2 $文献值进行了校准。由于现在已弃用的这种参考文献的广泛使用，我们的方法会影响X射线吸收光谱的许多分支。此外，它有可能将那里的绝对不确定性降低到MEV水平以下。
We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable transitions of highly charged ions, allowing us to measure the K-shell Rydberg spectrum of molecular O$_2$ with 8 meV uncertainty. We reveal a systematic $\sim$450 meV shift from previous literature values, and settle an extraordinary discrepancy between astrophysical and laboratory measurements of neutral atomic oxygen, the latter being calibrated against the aforementioned O$_2$ literature values. Because of the widespread use of such, now deprecated, references, our method impacts on many branches of x-ray absorption spectroscopy. Moreover, it potentially reduces absolute uncertainties there to below the meV level.
