Shape coexistence of bismuth isotopes

我的导师是Andrei Andreyev教授。将进行两项经批准的实验。它们是：- ISOLDE（CERN）和GARIS（RIKEN）的低能β延迟裂变。-用激光光谱学在ISOLDE（CERN）研究铋同位素链中的形状共存和电荷半径。低能β延迟裂变将于2016年6 - 7月进行，加里斯实验计划于2016年12月进行。这些实验将使我们能够解决与外来核的低能裂变有关的三个重要问题。这些是：-这些核的裂变屏障的高度和同位旋依赖性-裂变反应中裂变碎片的质量/电荷分布-壳层效应对这些外来核裂变的影响。这些数据将使用裂变过程的模型计算进行分析。这涉及到使用ROOT CERN来分析从实验中产生的数据和不同类型的光谱。最初，所涉及的工作是研究α和γ衰变的选择和宇称规则，以及研究超精细光谱（HFS）。合作小组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.