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探索原子核的壳层演化,验证奇特核的幻数结构是香港大学核物理研究的重要方向。目前,科研团队利用在束伽玛谱学技术已经研究了~(30)Ne的N=20幻数消失和~(78)Ni(Z=28,N=50)附近原子核的双幻数结构,而即将开展的~(53,56)Ca在束伽玛谱学实验会对新幻数N=34的定量研究,以及到N=40核的壳层演化提供重要的数据。下一步的研究目标是探索~(100)Sn(N=Z=50)的奇特结构,特别是研究它的第一个2+激发态与其邻近原子核的低激发态性质。~(100)Sn处于质子滴线以及核天体快质子俘获路径上,因此,它的幻数结构及其临近原子核单粒子性能研究将会极大增强对核力和核合成机制的认识。为了进一步提高物理实验统计,香港大学在数量上增加了30% NaI(Tl)晶体从而全面升级了DALI2伽玛探测阵列。此外,为了探索远离稳定线核区的新物理,开展更高精度在束伽玛谱学实验,香港大学与中国科学院近代物理研究所、中国原子能科学研究院计划合作研制基于溴化镧晶体的新一代伽玛探测器阵列。这套阵列主要在兰州重离子加速器(HIRFL)和将来建成的强流重离子加速器(HIAF)等大科学装置上开展实验,从而在奇特核研究方面取得大量重要的成果,促进科研人员全面认识、理解核力以及天体核合成过程。
To explore the shell evolution of nuclei and to verify the magic number structure of strange nuclei is an important direction for the study of nuclear physics at the University of Hong Kong. At present, the research team has used the beam gamma spectroscopy technique to study the double magic number structure of nuclei near N = 20 magic number of ~ (30) Ne and ~ (78) Ni (Z = 28, N = 50) The forthcoming ~ (53,56) Ca in beam gamma spectroscopy experiments will provide important data for the quantitative study of the new magic number N = 34 and the evolution of the shell to N = 40 nuclei. The next research goal is to explore the peculiar structure of ~ (100) Sn (N = Z = 50), especially to study the low-excited-state properties of its first 2+ excited state and its neighboring nuclei. ~ (100) Sn is located on the proton drip line and the fast proton trapping path of nuclear astrocytoma. Therefore, the study of its magic number structure and its near nuclear single particle properties will greatly enhance the understanding of nuclear force and nuclear synthesis mechanism. In order to further improve the physical experiment statistics, the University of Hong Kong added an additional 30% NaI (Tl) crystal to fully upgrade the DALI2 gamma detection array. In addition, in order to explore new physics far away from the stable core region and carry out higher-order beam gamma spectroscopy experiments, the University of Hong Kong and the Institute of Modern Physics, Chinese Academy of Sciences and the China Institute of Atomic Energy are planning to cooperate in the development of a new crystal based on lanthanum bromide Generation of gamma detector arrays. Experiments have been conducted on such large-scale devices as the Lanzhou Heavy Ion Accelerator (HIRFL) and the High Intensity Ion Heavy Ion Accelerator (HIAF) built in the future so as to make a great deal of important achievements in the study of exotic nuclei and to promote a comprehensive understanding of scientific research personnel. Understanding nuclear forces and the process of astrocyte synthesis.