The Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPC-II) is a multi-purpose hadron physics experiment optimized in the tau-charm energy region. Its world-record samples of vector charmonia such as J/Psi, Psi(3686) and Psi(3773), as well as energy scans between 2.0 GeV and 4.95 GeV have opened new avenues in hadron spectroscopy and structure. Furthermore, recently...
For the P̄ANDA@HADES collaboration Hyperons, baryons incorporating at least one strange quark in the composite, are the focus of research due to several physics interests. A particularly exciting area is the investigation of interactions between hyperons, which could offer insights into the nature of hyperonization and matter in extreme conditions such as neutron star cores [1]. Hyperons,...
Due to their comparatively long lifetimes, hyperons decay at macroscopic distances from the primary interaction point in particle collider experiments. Because of these displaced decay vertices, the efficient and accurate reconstruction of their daughter particles has remained a long-standing challenge. In a previous work, geometric deep learning was successfully used to reconstruct simulated...
In recent years new technologies in producing Lagrangians in Effective Field Theory at higher orders have become available. I will present the techniques used and an overview of recent results.
The European Spallation Source (ESS) is a neutron facility under construction near Lund, Sweden. The facility will produce neutrons via proton-induced spallation reactions for various scientific applications. Under normal operation, many radionuclides will be produced and contained inside the tungsten target. However, in the scenario of the loss of coolant, it is predicted that these...
The capability to detect and accurately localize special nuclear materials (SNM) or other actinide materials is crucial for various nuclear security and safeguards applications including the management of radioactive waste. The Neutron-Gamma Emission Tomography (NGET) technique enables rapid detection and precise location of fissile materials by correlating the energy and the time of the...
Theoretically modelling ground-state properties across the nuclear chart remains an elusive task. While modern theoretical frameworks can predict nuclear masses with root mean square deviation below 600 keV in comparison to experimental data, recent Bayesian model averaging approaches present statistical frameworks to significantly decrease the rms. These Bayesian approaches also provide...
We have done a systematic beta-decay study of the even-even nuclei A=58,62,66, and 70 into N=Z odd-odd nuclei using the large-scale shell model. It was reported that the enhancement in GT transition strength in 70Br compared to the beta-decay of lighter 62Ge might be an indication of increased neutron-proton pairing correlation. To explore the np correlation in nuclei, we have employed an...
Within the Langevin framework, we investigate the dynamics of the fusion process for production of transfermium elements in reactions with 208Pb target. After the reacting nuclei have made contact, the early dynamical stage is dominated by the dissipation of the initial radial kinetic energy, while the subsequent shape evolution is diffusive. The probability for surmounting the inner barrier...
A new focal plane detector system for the Berkeley Gas-filled Separator (BGS) was designed, constructed, and tested offline with various α-decay and conversion-electron sources. The detector for SuperHeavy RECoils (SHREC) aims to identify separated recoiling heavy and superheavy nuclei using their implantation signal as well as their correlated radioactive decay paths. Following a...
The mechanism generating fission fragments’ large angular momenta is still a heavily discussed question in nuclear physics. Since they are not directly measurable, experimentally accessible observables are used to derive the angular momenta using nuclear model codes. One of these observables is the yield ratio between spin isomers produced in a fission reaction. For this reason, twenty-one...
Spectroscopic properties of exotic nuclei are powerful tools to obtain a better insight on the evolution of nuclear structure far from the stability. Mid-shell nuclei are expected to exhibit collective behaviour which is typically reflected in the observation of low excitation energies of the first excited states and high transition probabilities. Moreover, the collectivity is expected to...
Reduced transition probabilities B(E2) in even-mass tellurium nuclei, accessible experimentally through lifetime measurements, have long been of particular interest in order to study the effect on collectivity when adding two extra protons outside the closed Z=50 shell of Sn. Historically, the main focus has been on the extreme neutron deficient area, close to the neutron shell closure at...
