Laser spectroscopy on exotic nuclei

奇异核的激光光谱

• 批准号: SAPPJ-2017-00039
• 负责人: Pearson, Matthew
• 金额: $ 5.83万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=617812
• 关键词: Laser; spectroscopy; exotic; nuclei

Fast beam, collinear laser spectroscopy has long been seen as a highly sensitive method with which to probe nuclear structure of ground and long lived isomeric states. When coupled to radioactive beam facilities that are capable of producing long chains of isotopes of many chemical elements these techniques can provide invaluable information on the evolution of nuclear structure from stability out to the drip lines. The use of high resolution laser spectroscopy of the atomic electrons, which in turn directly probe the nucleus, leads to a non-destructive, highly sensitive probe that can extract subtle nuclear effects in a largely model independent way. In general these methods allow for the unambiguous determination of the nuclear spin, magnetic dipole and electric quadrupole moments along with the changes in the RMS charge radii along a nuclear chain. In certain cases it is also possible to extract higher order affects such as the nuclear magnetisation distribution, magnetic octupole moments and the absolute RMS charge radii. As such the results from this work has far reaching impact across many areas of nuclear physics ranging from nuclear structure through weak nucleon-nucleon interactions to fundamental symmetry tests of the standard model.

快束共线激光光谱学一直被认为是探测基态和长寿命同质异能态核结构的高灵敏度方法。当与能够产生许多化学元素的同位素长链的放射性束设施结合时，这些技术可以提供关于核结构从稳定到滴线演变的宝贵信息。使用原子电子的高分辨率激光光谱，这反过来又直接探测原子核，导致一种非破坏性的，高灵敏度的探针，可以在很大程度上独立于模型的方式提取微妙的核效应。一般来说，这些方法允许明确的确定核自旋，磁偶极子和电四极矩沿着的RMS电荷半径沿着的变化的核链。在某些情况下，还可以提取更高阶的影响，例如核磁化分布、磁八极矩和绝对RMS电荷半径。因此，这项工作的结果对核物理的许多领域都有深远的影响，从核结构到弱核子-核子相互作用，再到标准模型的基本对称性检验。