Spectroscopy of Superheavy Nuclei: The SAGE spectrometer

超重核光谱：SAGE 光谱仪

• 批准号: EP/D002257/1
• 负责人: Rolf-Dietmar Herzberg
• 金额: $ 137.96万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD002257%2F1
• 关键词: Spectroscopy; Superheavy; Nuclei; SAGE; spectrometer

The majority of the mass of the universe is made up of atomic nuclei that lie at the centre of the atom. Nuclei contain positively charged protons and electrically neutral neutrons. The lightest known nucleus is that of hydrogen that contains just one proton but no one yet knows how heavy a nucleus can be; in other words, just how many neutrons and protons can be made to bind together. The aim of this proposal is to address this question by studying the heaviest nuclei that can be made in the laboratory. These nuclei are extremely difficult to create and study. The heaviest man-made elements today (unnamed as yet) have as many as 116 protons, but have been produced in tiny quantities of a few atoms only. Both protons and neutrons are held together by the strong nuclear force but protons are repelled from each other because of their electric charge. The nuclear force has an extremely short range, affecting nearest neighbours only, so that, as more and more protons are added to a nucleus the electrostatic repulsion will eventually become stronger than the nuclear binding forces and the nucleus will become unstable. The neutrons and protons will no longer stick together. This should happen for nuclei beyond uranium, which has 92 protons but the existence of heavier species comes about because of the internal structure within the nuclei. Just as noble gases owe their inert chemical behaviour to a specific arrangement of electrons that has extra stability, so certain 'magic' proton and neutron numbers also enhance nuclear stability. This project is concerned with a detailed study of the underlying mechanisms that yield this extra stability and allow 'superheavy' nuclei to exist. The main focus of this work will be on nuclei around nobelium with 102 protons, approximately halfway between the well-studied nuclei around uranium and the frontier of superheavy elements. Here spectroscopic methods can be used to gain detailed insights into the shape of the nucleus and the b

宇宙的大部分质量是由位于原子中心的原子核组成的。原子核含有带正电荷的质子和带电中性的中子。已知的最轻的原子核是氢核，它只含有一个质子，但还没有人知道一个原子核有多重；换句话说，到底有多少个中子和质子可以结合在一起。这项提议的目的是通过研究实验室中可以制造的最重的原子核来解决这个问题。这些原子核的创造和研究极其困难。如今最重的人造元素(尚未命名)有多达116个质子，但只有极少量的几个原子产生。质子和中子都被强大的核力保持在一起，但质子因为带电而相互排斥。核力具有极短的射程，只影响最近的邻居，因此，随着越来越多的质子被添加到原子核中，静电斥力最终将变得比核结合力更强，原子核将变得不稳定。中子和质子将不再粘在一起。这应该发生在铀以外的原子核上，铀有92个质子，但由于原子核的内部结构，导致了更重物种的存在。就像惰性气体的惰性化学行为归因于具有额外稳定性的特定电子排列一样，某些“神奇”的质子和中子数也会增强核的稳定性。这个项目涉及对产生这种额外稳定性并允许“超重”核存在的潜在机制的详细研究。这项工作的主要焦点将是有102个质子的Nb周围的原子核，大约在铀周围经过充分研究的原子核和超重元素的前沿之间。在这里，光谱方法可以用来获得对原子核和b的形状的详细了解。

项目成果

Competing Decay Modes of a High-spin Isomer in the Proton-unbound Nucleus $^{158}$Ta

质子非束缚核中高自旋异构体的竞争衰变模式 $^{158}$Ta

• DOI: 10.5506/aphyspolb.46.695
• 发表时间: 2015
• 期刊: Acta Physica Polonica B
• 影响因子: 0.5
• 作者: Carroll R

Shape coexistence in the neutron-deficient even-even (182-188)Hg isotopes studied via coulomb excitation.

通过库仑激发研究了缺中子偶-偶 (182-188)Hg 同位素的形状共存。

• DOI: 10.1103/physrevlett.112.162701
• 发表时间: 2014
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Bree N

Blurring the boundaries: decays of multiparticle isomers at the proton drip line.

• DOI: 10.1103/physrevlett.112.092501
• 发表时间: 2014-03
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: R. Carroll;R. Page;D. Joss;J. Uusitalo;I. Darby;K. Andgren;B. Cederwall;S. Eeckhaudt;T. Grahn;C. Gray-Jones;P. Greenlees;B. Hadinia;P. Jones;R. Julin;S. Juutinen;M. Leino;A. Leppänen;M. Nyman;D. O’Donnell;J. Pakarinen;P. Rahkila;M. Sandzelius;J. Sarén;C. Scholey;D. Seweryniak;J. Simpson

TSR: A storage and cooling ring for HIE-ISOLDE

TSR：HIE-ISOLDE 的存储和冷却环

• DOI: 10.1016/j.nimb.2015.12.006
• 发表时间: 2016
• 期刊: Beam Interactions with Materials and Atoms
• 作者: Butler P

a -decay spectroscopy of the chain 179 Tl g ? 175 Au g ? 171 Ir g ? 167 Re m

链 179 Tl g 的 a 衰变光谱？

• DOI: 10.1103/physrevc.87.054311
• 发表时间: 2013
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Andreyev A