九大原子核セミナー

2019年05月17日(金) 16:30〜18:00

講師： Benjamin F. Gibson (Los Alamos National Laboratory)
演題：Some Aspects of strangeness in few-body physics
場所：ウェスト1号館7階 物理セミナー室3 (W1-A-723室)

概要：
We nuclear theorists build computer models of nuclei and of nuclear reactions.
We take the models seriously: that is, we calculate measured physical observables and attempt to understand the underlying physics.
I will report some of our successes in few-nucleon (neutron and proton or baryons without strangeness) physics – primarily the tri-nucleons and the alpha particle.
I will describe the successful utilization of this understanding to predict the binding energies of the heavier p-shell nuclei.
Then I will address the question of whether our models of nuclei in the strangeness zero sector extrapolate to explain nuclei in the strangeness -1 sector in which the Lambda baryon plays a key role.
Or are our models merely an exquisite tool for interpolation in the non-strange nuclear physics realm?

2019年04月12日(金) 16:30〜18:00

講師： Dong BAI氏 (Nanjing University)
演題：Preliminary Results on Non-Localized Clustering in Alpha- Alpha Elastic Scattering
場所：ウェスト1号館7階 物理セミナー室3 (W1-A-723室)

概要：
Cluster structures play an important role in nuclear many-body systems. The non-localized clustering is a new picture for nuclear cluster physics proposed recently. Unlike the traditional picture of localized clustering where the clusters are thought to be arranged in rigid positions, in this new picture the clusters could move freely in nuclear containers. The non-localized cluster model has been applied to study the properties of bound states and resonance states in various light nuclei and hypernuclei. It is an important subject to extend it also to study elastic scattering and other reaction processes. Especially, it is interesting to study how the nuclear container evolves in reaction processes. In this talk, I would like to report some preliminary results on non- localized clustering in alpha-alpha elastic scattering. A general introduction to non-localized clustering and the microscopic R-matrix theory will be given first. The theoretical formalism for our study will then be discussed in detail, along with some preliminary numerical results. Some ideas on future projects will be also discussed briefly.