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arXiv 2004.03314nucl-ex
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用μ子原子研究核性质

Study of nuclear properties with muonic atoms

A. Knecht, A. Skawran, S. M. Vogiatzi

摘要:

μ子是研究原子核性质的一种很有吸引力的探针。μ子原子可以很容易地通过阻止材料中的负μ子来形成。μ介子随后被原子核捕获,由于其质量比电子大得多,因此以非常小的距离绕原子核运行。在这个原子俘获过程中,μ子在其级联下降到基态的过程中发射特征X射线。这些X射线的能量揭示了μ子能级方案,从中可以提取核电荷半径或其四极矩等属性。虽然几乎所有的稳定元素都已经用μ子进行了检测,但探测高放射性原子到目前为止还不可能。muX实验开发了一种基于高压氢/氘气电池内的转移反应的技术,以检查仅以微克数量提供的目标。

英文摘要:

Muons are a fascinating probe to study nuclear properties. Muonic atoms can easily be formed by stopping negative muons inside a material. The muon is subsequently captured by the nucleus and, due to its much higher mass compared to the electron, orbits the nucleus at very small distances. During this atomic capture process the muon emits characteristic X-rays during its cascade down to the ground state. The energies of these X-rays reveal the muonic energy level scheme, from which properties like the nuclear charge radius or its quadrupole moment can be extracted. While almost all stable elements have been examined using muons, probing highly radioactive atoms has so far not been possible. The muX experiment has developed a technique based on transfer reaction inside a high pressure hydrogen/deuterium gas cell to examine targets available only in microgram quantities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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