论文标题
肌动剂激光光谱的最新进展
Recent progress in laser spectroscopy of the actinides
论文作者
论文摘要
在最重的元素中执行激光光谱的兴趣来自相对论效应，电子相关性和量子电动力学对其原子结构的强烈影响。一旦得到充分了解这种原子结构，激光光谱也可以以核模型独立的方式获得核特性，例如旋转，均方根电荷半径和电磁矩。对于$ n = 152 $，这是壳稳定的变形核区域，这是最重的actinides尤其令人感兴趣的。该区域的激光光谱的实验进步受益于连续的方法论和技术发展，例如引入缓冲 - 驱动技术的技术，从而使能够访问越来越奇特的核远处的稳定性。这项工作中面临的主要挑战是小收益率很小，半衰期相当短的核素，以及在理论预测引导的广泛光谱范围内需要寻找原子过渡。本文介绍了最常见的实验方法的基础知识，并讨论了有关actinides的原子和核特性的最新结果，直到诺贝尔岛，在那里在GSIHelmholtzentrumfürschwerionenforschung在德国达姆斯塔特的GSIHelmholtzentrumfürschwerionenforschung进行了开拓性实验。
The interest to perform laser spectroscopy in the heaviest elements arises from the strong impact of relativistic effects, electron correlations and quantum electrodynamics on their atomic structure. Once this atomic structure is well understood, laser spectroscopy also provides access to nuclear properties such as spins, mean square charge radii and electromagnetic moments in a nuclear-model independent way. This is of particular interest for the heaviest actinides around $N = 152$, a region of shell stabilized deformed nuclei. The experimental progress of laser spectroscopy in this region benefitted from continuous methodological and technical developments such as the introduction of buffer-gas-stopping techniques that enabled the access to ever more exotic nuclei far-off stability. The key challenges faced in this endeavor are small yields, nuclides with rather short half-lives and the need to search for atomic transitions in a wide spectral range guided by theoretical predictions. This paper describes the basics of the most common experimental methods and discusses selected recent results on the atomic and nuclear properties of the actinides up to nobelium where pioneering experiments were performed at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany.
