Laser resonance ionization mass spectroscopy of radioactive isotopes

放射性同位素的激光共振电离质谱

• 批准号: SAPIN-2017-00039
• 负责人: Lassen, Jens
• 金额: $ 2.33万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 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=617829
• 关键词: Laser; resonance; ionization; mass; spectroscopy

The program in "Laser resonance ionization mass spectrometry of radioactive isotopes" seeks to investigate trends in the optical isotope shifts in isotopes of At, Ra, Ac, and the actinide elements – many of which have not been measured before. Laser resonance ionization has emerged as a highly sensitive and selective method in trace detection, which also allows to probe nuclear structure of ground state and long lived isomeric states of atomic nuclei. In combination with radioactive ion beam facilities that give access to a great number of isotopes of particular elements, this technique can be used to map the evolution of nuclear structure from stability out to the drip lines. The nuclear information is accessed via laser spectroscopy of the atomic electrons that probe the nucleus. This interaction is a sensitive, non-destructive probe that allows to extract subtle nuclear effects in a largely model independent way. The particular nuclear properties measureable are: nuclear spin, magnetic dipole and electric quadrupole moments and changes in the root mean square charge radii among isotopes of a specific element in a nuclear chain. In some cases higher order effects such as magnetic octupole moments can be extracted as well.

“放射性同位素的激光共振电离质谱”项目旨在研究At，Ra，Ac和锕系元素同位素的光学同位素位移趋势-其中许多以前从未测量过。激光共振电离是一种高灵敏度、高选择性的痕量探测方法，可以探测原子核的基态和长寿命同质异能态的核结构。结合放射性离子束设施，可以获得大量特定元素的同位素，这项技术可以用来绘制从稳定到滴线的核结构演变。核信息是通过探测原子核的原子电子的激光光谱学获得的。这种相互作用是一种敏感的、非破坏性的探测器，可以以一种基本上独立于模型的方式提取微妙的核效应。可测量的特殊核性质是：核自旋、磁偶极子和电四极矩以及核链中特定元素的同位素之间均方根电荷半径的变化。在某些情况下，也可以提取更高阶的效应，例如磁八极矩。