Shape coexistence of bismuth isotopes

我这个项目的导师是安德烈·安德列耶夫教授。将进行两项已获批准的实验。-Isolde(CERN)和Garis(RIKEN)的低能β延迟裂变-Isolde(CERN)的激光光谱学研究铋同位素链中的形状共存和电荷半径。低能Beta延迟裂变将在2016年6-7月进行，Garis实验计划在2016年12月进行。这些实验将使我们能够解决与奇异核的低能裂变有关的三个重要问题。它们是：-这些核的裂变势垒的高度和同位旋依赖性-裂变反应产生的裂变碎片的质量/电荷分布-壳层效应对这些奇异核裂变的影响将使用裂变过程的模型计算来分析数据。这涉及到使用ROOT CERN来分析实验产生的数据和不同类型的光谱。最初，所涉及的工作是研究阿尔法和伽马衰变的选择和宇称规则，以及超精细光谱(HFS)。该合作与约克的理论小组保持密切联系。

My supervisor for this project is professor Andrei Andreyev. There are two approved experiments which will be carried out. These are:- Low-energy beta-delayed fission at ISOLDE(CERN) and GARIS(RIKEN).- Shape coexistence and charge radii in the chain of bismuth isotopes studies by laserspectroscopy at ISOLDE(CERN).The low energy beta delayed fission will be carried out in June-July 2016 and the Garis experiment is scheduled to occur in December 2016. These experiments will allow us to address three important problems which are related to the low energy fission of exotic nuclei. These are:- The height and isospin dependence of the fission barriers of these nuclei- the mass/charge distribution of fission fragments from the fission reactions- The influence of the shell effects on fission of these exotic nucleiThe data will be analysed using the model calculations for the fission process. This involves using ROOT CERN to analyse the data and different types of spectra that have been produced from the experiment. Initially, the work that has been involved is looking into the selection and parity rules of alpha and gamma decay as well as looking at hyperfine spectroscopy (HFS). The collaboration is in close contact with the theory groups in York.