Studies of Re?ection Asymmetry in Heavy Nuclei
Studies of Re?ection Asymmetry in Heavy Nuclei
复制标题
重核反射不对称性的研究
DOI：
10.1088/1402-4896/ad22c9
复制
发表时间：
2024
期刊：
影响因子：
2.9
通讯作者：
Butler P
中科院分区：
文献类型：
--
作者：
Butler P
对于质子和中子的某些组合，预计原子核的形状可以经历八极变形，这将引起反射不对称或“梨形”。这里描述了欧洲核子研究中心最近使用 HIE-ISOLDE 设施加速放射性束并使用迷你球光谱仪检测随后的 γ 发射的实验如何提供证据证明几种镭和氡同位素具有稳定的梨形或本质上是八极振动。将它们的行为与 A≈ 150 的原子核的行为进行比较，表现出很强的八极相关性。将会表明，过渡时刻的数据对理论提出了一些挑战。还将讨论这些测量与原子 EDM 搜索的相关性。
For certain combinations of protons and neutrons it is expected that the shape of atomic nuclei can undergo octupole deformation, which would give rise to reflection asymmetry or a'pear shape'. Here it is described how recent experiments carried out at CERN using the HIE-ISOLDE facility to accelerate radioactive beams and detect the subsequent γ-emission using the Miniball spectrometer have provided evidence that several radium and radon isotopes have either stable pear shapes or are octupole vibrational in nature. Their behaviour is compared with that of nuclei with A≈ 150 exhibiting strong octupole correlations. It will be shown that the data on transition moments present some challenges for theory. The relevance of these measurements for atomic EDM searches will also be discussed.