Laser Spectroscopy of Radioactive Isotopes

在这个博士项目中，外来同位素的核结构将使用激光光谱技术进行研究。实验结果将在国际粒子加速器实验室获得，包括芬兰的JYFL和加拿大的TRIUMF，这些实验室将在核反应中产生放射性同位素，供立即研究。学生将开发和执行这样的实验技术作为适当的。数据分析需要编程技能。结果将揭示几个核可观测值，例如沿着同位素链变化的核大小和形状，以及磁矩和核自旋角动量，它们揭示了内部单个核子的行为。这将构成对核物理领域的原创性贡献，并将导致在著名学术期刊上发表的结果。研究的确切重点将视探索性试验的结果而定，但很可能是，例如：（1）N=Z同位素从元素到元素的核半径的行为，以及具有零和非零核自旋的基态/同质异能态之间的比较。(2)54 Ti的均方电荷半径，由于在TRIUMF提出，这对应于N=32。这已经被提出作为一个新的幻数，但令人惊讶的是，在附近的钙链中产生了一个扩大的半径。

In this PhD project, the nuclear structure of exotic isotopes will be investigated using the technique of laser spectroscopy. Experimental results will be obtained at international particle accelerator laboratories, including JYFL in Finland and TRIUMF in Canada, where the radioactive isotopes will be produced in nuclear reactions for immediate study. The student will develop and execute such experimental techniques as appropriate. Programming skills will be required for data analysis. The results will reveal several nuclear observables, such as the changing nuclear size and shape along an isotope chain, and the magnetic moments and nuclear spin angular momenta which reveal the behaviour of individual nucleons inside. This will constitute an original contribution to the field of nuclear physics and will lead to results which are publishable in reputable academic journals. The precise focus of research will be left flexible, depending on the results of exploratory tests, but will likely be, for example: (1) The behaviour of nuclear radii from element to element for N=Z isotopes, and a comparison between ground/isomeric states with zero and non-zero nuclear spin.(2) The mean-square charge radius of 54Ti, due to be proposed at TRIUMF, which corresponds to N=32. This has been proposed as a new magic number, but surprisingly yielded an enlarged radius in the nearby calcium chain.