论文标题
astatine的电子亲和力
The electron affinity of astatine
论文作者
论文摘要
影响元件化学行为的最重要的特性之一是在中性原子中添加额外的电子释放的能量，称为电子亲和力（EA）。在其余EA的剩余元素中，纯放射性元素85。Statine是天然发生的最重的卤素，其同位素$^{211} $非常适合靶向的放射性核素治疗癌症的癌症。由于AT $^ - $阴离子参与了当前Astatine标签协议的许多方面，因此对该元素的电子亲和力的了解至关重要。此外，EA可用于推断其他概念，例如电负性，从而进一步提高了对Astatine化学的理解。在这里，我们报告了ASTATINE为2.41578（7）EV的第一个测量值。将该结果与最新的相对论量子机械计算进行了比较，这些计算需要将电子电子相关效应纳入最高水平。放射性同位素的激光 - 光检查光谱的开发技术为未来的EA测量其他放射性元素（例如polonium）以及最终以超重元素产生的超重元素的方式开辟了道路。
One of the most important properties influencing the chemical behavior of an element is the energy released with the addition of an extra electron to the neutral atom, referred to as the electron affinity (EA). Among the remaining elements with unknown EA is astatine, the purely radioactive element 85. Astatine is the heaviest naturally occurring halogen and its isotope $^{211}$At is remarkably well suited for targeted radionuclide therapy of cancer. With the At$^-$ anion being involved in many aspects of current astatine labelling protocols, the knowledge of the electron affinity of this element is of prime importance. In addition, the EA can be used to deduce other concepts such as the electronegativity, thereby further improving the understanding of astatine's chemistry. Here, we report the first measurement of the EA for astatine to be 2.41578(7)eV. This result is compared to state-of-the-art relativistic quantum mechanical calculations, which require incorporation of the electron-electron correlation effects on the highest possible level. The developed technique of laser-photodetachment spectroscopy of radioisotopes opens the path for future EA measurements of other radioelements such as polonium, and eventually super-heavy elements, which are produced at a one-atom-at-a-time rate.
