Travel to GSI (September 2009) and Jyvaskyla (October 2009) for experiments on neutron-rich zirconium nuclei,

前往 GSI（2009 年 9 月）和于韦斯屈莱（2009 年 10 月）进行富中子锆核实验，

• 批准号: ST/H004106/1
• 负责人: Alison Bruce
• 金额: $ 1.75万
• 依托单位: University of Brighton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FH004106%2F1
• 关键词: Travel; GSI; September; 2009; Jyvaskyla

Most of the mass of an atom is in the nucleus which contains protons and neutrons with the number of protons defining the chemical element. The nucleus is held together by a balance between the weak force, the Coulomb force which pushes the protons apart and the nuclear force which pulls all the neutrons and protons together. It is a delicate balancing act to calculate the relative strengths of the three forces and there are many models which try to solve this tricky problem. For light stable nuclei, the number of neutrons and protons is essentially equal but for heavier nuclei, the number of neutrons exceeds the number of protons by about 40%. In the nuclear power industry, by-products are made which do not have these 'magic' ratios and they decay by emitting particles and energy until one of the stable combinations is reached. In order to understand this process and indeed predict how other nuclei away from stability (e.g those used as isotope tracers in medical diagnosis) will behave, it is necessary to test the models, outlined above, in regions which were not used to derive them. Of particular interest for this proposal are nuclei with mass number ~110 which have ~70 neutrons and ~40 protons, i.e. a large excess of neutrons over protons. These nuclei lie along the route by which about half the stable nuclei heavier than iron are thought to have been made after the big bang and so are important to our understanding of how the universe in its current form was created. This research programme will produce these nuclei at accelerator facilities and study their decay properties. The results of our work will be used to define which models of nuclear behaviour are appropriate in this region.

原子的大部分质量在原子核中，原子核包含质子和中子，质子的数量定义了化学元素。原子核是通过弱力的平衡结合在一起的，库仑力将质子推开，核力将所有的中子和质子拉在一起。计算这三种力的相对强度是一个微妙的平衡行为，有许多模型试图解决这个棘手的问题。对于轻稳定核，中子和质子的数量基本相等，但对于较重的核，中子的数量超过质子的数量约40%。在核能工业中，副产品没有这些“神奇”的比例，它们通过释放粒子和能量来衰变，直到达到稳定的组合之一。为了理解这一过程，并确实预测其他原子核（例如，在医学诊断中用作同位素示踪剂的原子核）将如何表现，有必要在未用于导出它们的区域中测试上述模型。对于这个提议特别感兴趣的是质量数为~110的核，其具有~70个中子和~40个质子，即中子比质子多得多。这些原子核沿着大爆炸后形成的比铁重的稳定原子核的一半的路线，因此对我们理解宇宙是如何形成的非常重要。这项研究方案将在加速器设施中产生这些核，并研究它们的衰变特性。我们的工作成果将用于确定哪些核行为模式适用于这一区域。

项目成果

Trap-assisted separation of nuclear states for gamma-ray spectroscopy: the example of 100 Nb

伽马射线光谱的陷阱辅助核态分离：以 100 Nb 为例

• DOI: 10.1088/0954-3899/39/1/015101
• 发表时间: 2012
• 期刊: Nuclear and Particle Physics
• 作者: Triguero C

Core-coupled states and split proton-neutron quasiparticle multiplets in 122 - 126 Ag

122 - 126 Ag 中的核心耦合态和分裂质子-中子准粒子多重态

• DOI: 10.1103/physrevc.87.034308
• 发表时间: 2013
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Lalkovski S

The population of metastable states as a probe of relativistic-energy fragmentation reactions

• DOI: 10.1016/j.physletb.2013.05.033
• 发表时间: 2013-06
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: A. Bacelar;A. Bruce;Z. Podolyák;N. Al-Dahan;M. Gorska;S. Lalkovski;S. Pietri;M. Ricciardi;A. Algora;N. Alkhomashi;J. Benlliure;P. Boutachkov;A. Bracco;E. Calore;E. Casarejos;I. Cullen;A. Deo;P. Detistov;Z. Dombrádi;C. Domingo-Pardo;M. Doncel;F. Farinon;G. Farrelly;H. Geissel;W. Gelletly;J. Gerl;N. Goel;J. Grebosz;R. Hoischen;I. Kojouharov;N. Kurz;S. Leoni;F. Molina;D. Montanari;A. Morales;A. Musumarra;D. Napoli;R. Nicolini;C. Nociforo;A. Prochazka;W. Prokopowicz;P. Regan;B. Rubio;D. Rudolph;K. Schmidt;H. Schaffner;S. Steer;K. Steiger;P. Strmen;T. Swan;I. Szarka;J. Valiente-Dobon;S. Verma;P. Walker;H. Weick;H. Wollersheim

Shape coexistence and isomeric states in neutron-rich Tc 112 and Tc 113

富中子 Tc 112 和 Tc 113 的形状共存和异构态

• DOI: 10.1103/physrevc.82.044312
• 发表时间: 2010
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Bruce A