Laser Spectroscopy of Radioactive Isotopes

本博士项目将利用激光光谱学技术研究外来同位素的核结构。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，放射性同位素将在核反应中产生，以供立即研究。学生将开发和执行适当的实验技术。数据分析需要编程技能。结果将揭示几个核观测结果，例如原子核大小和形状沿着同位素链的变化，以及揭示内部单个核子行为的磁矩和核自旋角动量。这将构成对核物理学领域的原创性贡献，并将导致可在知名学术期刊上发表的结果。根据探索性试验的结果，研究的确切重点将是灵活的，但可能是，例如：(1)N=Z同位素从元素到元素的核半径的行为，以及核自旋为零和非零的基态/同分异构体状态之间的比较。(2)拟在TRIUMF提出的54Ti的均方电荷半径，对应于N=32。这已经被提出作为一个新的神奇数字，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.